2660064997 has 4 divisors (see below), whose sum is σ = 2660402016. Its totient is φ = 2659727980.

The previous prime is 2660064983. The next prime is 2660065027. The reversal of 2660064997 is 7994600662.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2660064997 - 2¹⁵ = 2660032229 is a prime.

It is a super-2 number, since 2×2660064997² = 14151891576529220018, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2660064997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2660064947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156379 + ... + 172552.

It is an arithmetic number, because the mean of its divisors is an integer number (665100504).

Almost surely, 2^2660064997 is an apocalyptic number.

It is an amenable number.

2660064997 is a deficient number, since it is larger than the sum of its proper divisors (337019).

2660064997 is an equidigital number, since it uses as much as digits as its factorization.

2660064997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337018.

The product of its (nonzero) digits is 979776, while the sum is 49.

The square root of 2660064997 is about 51575.8179479492. The cubic root of 2660064997 is about 1385.5772675615.

The spelling of 2660064997 in words is "two billion, six hundred sixty million, sixty-four thousand, nine hundred ninety-seven".