66807474 has 16 divisors (see below), whose sum is σ = 138222720. Its totient is φ = 21501200.

The previous prime is 66807457. The next prime is 66807547. The reversal of 66807474 is 47470866.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191802 + ... + 192149.

It is an arithmetic number, because the mean of its divisors is an integer number (8638920).

Almost surely, 2^66807474 is an apocalyptic number.

66807474 is an abundant number, since it is smaller than the sum of its proper divisors (71415246).

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

66807474 is a wasteful number, since it uses less digits than its factorization.

66807474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383985.

The product of its (nonzero) digits is 225792, while the sum is 42.

The square root of 66807474 is about 8173.5839140490. The cubic root of 66807474 is about 405.7654051716.

The spelling of 66807474 in words is "sixty-six million, eight hundred seven thousand, four hundred seventy-four".