66574380 has 48 divisors (see below), whose sum is σ = 197376480. Its totient is φ = 16708608.

The previous prime is 66574373. The next prime is 66574381. The reversal of 66574380 is 8347566.

It is not an unprimeable number, because it can be changed into a prime (66574381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31615 + ... + 33654.

It is an arithmetic number, because the mean of its divisors is an integer number (4112010).

Almost surely, 2^66574380 is an apocalyptic number.

66574380 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66574380 is an abundant number, since it is smaller than the sum of its proper divisors (130802100).

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

66574380 is a wasteful number, since it uses less digits than its factorization.

66574380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65298 (or 65296 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 66574380 is about 8159.3124710358. The cubic root of 66574380 is about 405.2929445873.

The spelling of 66574380 in words is "sixty-six million, five hundred seventy-four thousand, three hundred eighty".