66601260 has 72 divisors (see below), whose sum is σ = 220396176. Its totient is φ = 16145280.

The previous prime is 66601259. The next prime is 66601273. The reversal of 66601260 is 6210666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14839 + ... + 18798.

It is an arithmetic number, because the mean of its divisors is an integer number (3061058).

Almost surely, 2^66601260 is an apocalyptic number.

66601260 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66601260 is an abundant number, since it is smaller than the sum of its proper divisors (153794916).

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

66601260 is a wasteful number, since it uses less digits than its factorization.

66601260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33663 (or 33658 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 66601260 is about 8160.9595024115. The cubic root of 66601260 is about 405.3474841286.

The spelling of 66601260 in words is "sixty-six million, six hundred one thousand, two hundred sixty".