65660445497 has 32 divisors (see below), whose sum is σ = 71550812160. Its totient is φ = 60106536000.

The previous prime is 65660445493. The next prime is 65660445523. The reversal of 65660445497 is 79454406656.

It is a cyclic number.

It is not a de Polignac number, because 65660445497 - 2² = 65660445493 is a prime.

It is a super-2 number, since 2×65660445497² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65660445493) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10400972 + ... + 10407282.

It is an arithmetic number, because the mean of its divisors is an integer number (2235962880).

Almost surely, 2^65660445497 is an apocalyptic number.

It is an amenable number.

65660445497 is a deficient number, since it is larger than the sum of its proper divisors (5890366663).

65660445497 is a wasteful number, since it uses less digits than its factorization.

65660445497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6605.

The product of its (nonzero) digits is 21772800, while the sum is 56.

The spelling of 65660445497 in words is "sixty-five billion, six hundred sixty million, four hundred forty-five thousand, four hundred ninety-seven".