66666674 has 16 divisors (see below), whose sum is σ = 103351488. Its totient is φ = 32227632.

The previous prime is 66666667. The next prime is 66666683. The reversal of 66666674 is 47666666.

66666674 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-4 number, since 4×66666674⁴ (a number of 32 digits) contains 4444 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9299 + ... + 14825.

It is an arithmetic number, because the mean of its divisors is an integer number (6459468).

Almost surely, 2^66666674 is an apocalyptic number.

66666674 is a deficient number, since it is larger than the sum of its proper divisors (36684814).

66666674 is a wasteful number, since it uses less digits than its factorization.

66666674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5729.

The product of its digits is 1306368, while the sum is 47.

The square root of 66666674 is about 8164.9662583504. The cubic root of 66666674 is about 405.4801479058.

The spelling of 66666674 in words is "sixty-six million, six hundred sixty-six thousand, six hundred seventy-four".