656022261660 has 48 divisors (see below), whose sum is σ = 1837174814496. Its totient is φ = 174909509632.

The previous prime is 656022261659. The next prime is 656022261677. The reversal of 656022261660 is 66162220656.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 573237 + ... + 1280876.

It is an arithmetic number, because the mean of its divisors is an integer number (38274475302).

Almost surely, 2^656022261660 is an apocalyptic number.

656022261660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

656022261660 is an abundant number, since it is smaller than the sum of its proper divisors (1181152552836).

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

656022261660 is a wasteful number, since it uses less digits than its factorization.

656022261660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1860022 (or 1860020 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 656022261660 in words is "six hundred fifty-six billion, twenty-two million, two hundred sixty-one thousand, six hundred sixty".