660855274497 has 48 divisors (see below), whose sum is σ = 1046299550400. Its totient is φ = 398615172480.

The previous prime is 660855274463. The next prime is 660855274523. The reversal of 660855274497 is 794472558066.

660855274497 is a `hidden beast` number, since 6 + 6 + 0 + 8 + 552 + 74 + 4 + 9 + 7 = 666.

It is not a de Polignac number, because 660855274497 - 2⁶ = 660855274433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (660855274997) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 91111123 + ... + 91118375.

It is an arithmetic number, because the mean of its divisors is an integer number (21797907300).

Almost surely, 2^660855274497 is an apocalyptic number.

It is an amenable number.

660855274497 is a deficient number, since it is larger than the sum of its proper divisors (385444275903).

660855274497 is a wasteful number, since it uses less digits than its factorization.

660855274497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11518 (or 11515 counting only the distinct ones).

The product of its (nonzero) digits is 101606400, while the sum is 63.

The spelling of 660855274497 in words is "six hundred sixty billion, eight hundred fifty-five million, two hundred seventy-four thousand, four hundred ninety-seven".