655517091660 has 24 divisors (see below), whose sum is σ = 1835447856816. Its totient is φ = 174804557760.

The previous prime is 655517091653. The next prime is 655517091721. The reversal of 655517091660 is 66190715556.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5462642371 + ... + 5462642490.

It is an arithmetic number, because the mean of its divisors is an integer number (76476994034).

Almost surely, 2^655517091660 is an apocalyptic number.

655517091660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

655517091660 is an abundant number, since it is smaller than the sum of its proper divisors (1179930765156).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

655517091660 is a wasteful number, since it uses less digits than its factorization.

655517091660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10925284873 (or 10925284871 counting only the distinct ones).

The product of its (nonzero) digits is 1701000, while the sum is 51.

The spelling of 655517091660 in words is "six hundred fifty-five billion, five hundred seventeen million, ninety-one thousand, six hundred sixty".