66896580 has 24 divisors (see below), whose sum is σ = 187310592. Its totient is φ = 17839072.

The previous prime is 66896579. The next prime is 66896597. The reversal of 66896580 is 8569866.

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, 557412 + ... + 557531.

It is an arithmetic number, because the mean of its divisors is an integer number (7804608).

Almost surely, 2^66896580 is an apocalyptic number.

66896580 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66896580 is an abundant number, since it is smaller than the sum of its proper divisors (120414012).

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

66896580 is a wasteful number, since it uses less digits than its factorization.

66896580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1114955 (or 1114953 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 48.

The square root of 66896580 is about 8179.0329501720. The cubic root of 66896580 is about 405.9457246640.

It can be divided in two parts, 66896 and 580, that added together give a palindrome (67476).

The spelling of 66896580 in words is "sixty-six million, eight hundred ninety-six thousand, five hundred eighty".