91560660 has 48 divisors (see below), whose sum is σ = 257816832. Its totient is φ = 24278400.

The previous prime is 91560643. The next prime is 91560709. The reversal of 91560660 is 6606519.

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, 6645 + ... + 15075.

It is an arithmetic number, because the mean of its divisors is an integer number (5371184).

Almost surely, 2^91560660 is an apocalyptic number.

It is an amenable number.

91560660 is an abundant number, since it is smaller than the sum of its proper divisors (166256172).

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

91560660 is a wasteful number, since it uses less digits than its factorization.

91560660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8624 (or 8622 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 91560660 is about 9568.7334585095. The cubic root of 91560660 is about 450.7159959755.

The spelling of 91560660 in words is "ninety-one million, five hundred sixty thousand, six hundred sixty".