6645035957 has 8 divisors (see below), whose sum is σ = 7595299200. Its totient is φ = 5695015824.

The previous prime is 6645035923. The next prime is 6645035983. The reversal of 6645035957 is 7595305466.

It is a happy number.

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 6645035957 - 2²⁶ = 6577927093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6645035557) 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, 2144 + ... + 115302.

It is an arithmetic number, because the mean of its divisors is an integer number (949412400).

Almost surely, 2^6645035957 is an apocalyptic number.

It is an amenable number.

6645035957 is a deficient number, since it is larger than the sum of its proper divisors (950263243).

6645035957 is a wasteful number, since it uses less digits than its factorization.

6645035957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121555.

The product of its (nonzero) digits is 3402000, while the sum is 50.

The square root of 6645035957 is about 81517.0899689139. The cubic root of 6645035957 is about 1880.0343245770.

The spelling of 6645035957 in words is "six billion, six hundred forty-five million, thirty-five thousand, nine hundred fifty-seven".