2660641651 has 8 divisors (see below), whose sum is σ = 2676006144. Its totient is φ = 2645292480.

The previous prime is 2660641637. The next prime is 2660641667. The reversal of 2660641651 is 1561460662.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2660641651 - 2⁷ = 2660641523 is a prime.

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 2660641651.

It is not an unprimeable number, because it can be changed into a prime (2660641631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 684325 + ... + 688201.

It is an arithmetic number, because the mean of its divisors is an integer number (334500768).

Almost surely, 2^2660641651 is an apocalyptic number.

2660641651 is a deficient number, since it is larger than the sum of its proper divisors (15364493).

2660641651 is a wasteful number, since it uses less digits than its factorization.

2660641651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7661.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 2660641651 is about 51581.4079974558. The cubic root of 2660641651 is about 1385.6773830280.

The spelling of 2660641651 in words is "two billion, six hundred sixty million, six hundred forty-one thousand, six hundred fifty-one".