66586730 has 32 divisors (see below), whose sum is σ = 138723840. Its totient is φ = 22538880.

The previous prime is 66586721. The next prime is 66586769. The reversal of 66586730 is 3768566.

It is a super-2 number, since 2×66586730² = 8867585224185800, which contains 22 as substring.

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, 491 + ... + 11550.

It is an arithmetic number, because the mean of its divisors is an integer number (4335120).

Almost surely, 2^66586730 is an apocalyptic number.

66586730 is an abundant number, since it is smaller than the sum of its proper divisors (72137110).

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

66586730 is a wasteful number, since it uses less digits than its factorization.

66586730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12134.

The product of its (nonzero) digits is 181440, while the sum is 41.

The square root of 66586730 is about 8160.0692399023. The cubic root of 66586730 is about 405.3180045697.

The spelling of 66586730 in words is "sixty-six million, five hundred eighty-six thousand, seven hundred thirty".