656661010601 has 8 divisors (see below), whose sum is σ = 660016377600. Its totient is φ = 653307938640.

The previous prime is 656661010553. The next prime is 656661010609. The reversal of 656661010601 is 106010166656.

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 a de Polignac number, because none of the positive numbers 2^k-656661010601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (656661010609) 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, 1415 + ... + 1146003.

It is an arithmetic number, because the mean of its divisors is an integer number (82502047200).

Almost surely, 2^656661010601 is an apocalyptic number.

It is an amenable number.

656661010601 is a deficient number, since it is larger than the sum of its proper divisors (3355366999).

656661010601 is a wasteful number, since it uses less digits than its factorization.

656661010601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1147519.

The product of its (nonzero) digits is 38880, while the sum is 38.

The spelling of 656661010601 in words is "six hundred fifty-six billion, six hundred sixty-one million, ten thousand, six hundred one".