66560964 has 24 divisors (see below), whose sum is σ = 157056480. Its totient is φ = 21937344.

The previous prime is 66560957. The next prime is 66560983. The reversal of 66560964 is 46906566.

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, 30094 + ... + 32229.

It is an arithmetic number, because the mean of its divisors is an integer number (6544020).

Almost surely, 2^66560964 is an apocalyptic number.

It is an amenable number.

66560964 is an abundant number, since it is smaller than the sum of its proper divisors (90495516).

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

66560964 is a wasteful number, since it uses less digits than its factorization.

66560964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62419 (or 62417 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 42.

The square root of 66560964 is about 8158.4903015203. The cubic root of 66560964 is about 405.2657180204.

The spelling of 66560964 in words is "sixty-six million, five hundred sixty thousand, nine hundred sixty-four".