66900004 has 12 divisors (see below), whose sum is σ = 117196828. Its totient is φ = 33415200.

The previous prime is 66899999. The next prime is 66900017. The reversal of 66900004 is 40000966.

66900004 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 12110400 + 54789604 = 3480^2 + 7402^2 .

It is a super-2 number, since 2×66900004² = 8951221070400032, which contains 22 as substring.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

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 3 ways as a sum of consecutive naturals, for example, 4107 + ... + 12274.

Almost surely, 2^66900004 is an apocalyptic number.

It is an amenable number.

66900004 is a deficient number, since it is larger than the sum of its proper divisors (50296824).

66900004 is a wasteful number, since it uses less digits than its factorization.

66900004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17406 (or 17404 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 66900004 is about 8179.2422631928. The cubic root of 66900004 is about 405.9526504513.

The spelling of 66900004 in words is "sixty-six million, nine hundred thousand, four".