66416004 has 24 divisors (see below), whose sum is σ = 172189920. Its totient is φ = 22138632.

The previous prime is 66415969. The next prime is 66416017. The reversal of 66416004 is 40061466.

It is a super-2 number, since 2×66416004² = 8822171174656032, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 307374 + ... + 307589.

It is an arithmetic number, because the mean of its divisors is an integer number (7174580).

Almost surely, 2^66416004 is an apocalyptic number.

It is an amenable number.

66416004 is an abundant number, since it is smaller than the sum of its proper divisors (105773916).

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

66416004 is a wasteful number, since it uses less digits than its factorization.

66416004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614976 (or 614968 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 66416004 is about 8149.6014626483. The cubic root of 66416004 is about 404.9713011214.

The spelling of 66416004 in words is "sixty-six million, four hundred sixteen thousand, four".