66684574 has 16 divisors (see below), whose sum is σ = 115539696. Its totient is φ = 28528000.

The previous prime is 66684533. The next prime is 66684581. The reversal of 66684574 is 47548666.

It is a super-2 number, since 2×66684574² = 8893664819122952, which contains 22 as substring.

It is a congruent number.

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, 88777 + ... + 89524.

It is an arithmetic number, because the mean of its divisors is an integer number (7221231).

Almost surely, 2^66684574 is an apocalyptic number.

66684574 is a deficient number, since it is larger than the sum of its proper divisors (48855122).

66684574 is a wasteful number, since it uses less digits than its factorization.

66684574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178331.

The product of its digits is 967680, while the sum is 46.

The square root of 66684574 is about 8166.0623313810. The cubic root of 66684574 is about 405.5164351276.

The spelling of 66684574 in words is "sixty-six million, six hundred eighty-four thousand, five hundred seventy-four".