2664690493 has 2 divisors, whose sum is σ = 2664690494. Its totient is φ = 2664690492.

The previous prime is 2664690463. The next prime is 2664690499. The reversal of 2664690493 is 3940964662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2240412889 + 424277604 = 47333^2 + 20598^2 .

It is a cyclic number.

It is not a de Polignac number, because 2664690493 - 2⁹ = 2664689981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2664690499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1332345246 + 1332345247.

It is an arithmetic number, because the mean of its divisors is an integer number (1332345247).

Almost surely, 2^2664690493 is an apocalyptic number.

It is an amenable number.

2664690493 is a deficient number, since it is larger than the sum of its proper divisors (1).

2664690493 is an equidigital number, since it uses as much as digits as its factorization.

2664690493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1679616, while the sum is 49.

The square root of 2664690493 is about 51620.6401839419. The cubic root of 2664690493 is about 1386.3799134760.

The spelling of 2664690493 in words is "two billion, six hundred sixty-four million, six hundred ninety thousand, four hundred ninety-three".