66074394 has 16 divisors (see below), whose sum is σ = 132498432. Its totient is φ = 21966528.

The previous prime is 66074389. The next prime is 66074413. The reversal of 66074394 is 49347066.

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, 12079 + ... + 16674.

It is an arithmetic number, because the mean of its divisors is an integer number (8281152).

Almost surely, 2^66074394 is an apocalyptic number.

66074394 is an abundant number, since it is smaller than the sum of its proper divisors (66424038).

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

66074394 is a wasteful number, since it uses less digits than its factorization.

66074394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29141.

The product of its (nonzero) digits is 108864, while the sum is 39.

The square root of 66074394 is about 8128.6157493143. The cubic root of 66074394 is about 404.2757854565.

The spelling of 66074394 in words is "sixty-six million, seventy-four thousand, three hundred ninety-four".