66677404 has 24 divisors (see below), whose sum is σ = 123713408. Its totient is φ = 31389120.

The previous prime is 66677399. The next prime is 66677407. The reversal of 66677404 is 40477666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66677407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2679 + ... + 11854.

Almost surely, 2^66677404 is an apocalyptic number.

It is an amenable number.

66677404 is a deficient number, since it is larger than the sum of its proper divisors (57036004).

66677404 is a wasteful number, since it uses less digits than its factorization.

66677404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14605 (or 14603 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 40.

The square root of 66677404 is about 8165.6233075008. The cubic root of 66677404 is about 405.5019007464.

It can be divided in two parts, 66677 and 404, that added together give a square (67081 = 259²).

The spelling of 66677404 in words is "sixty-six million, six hundred seventy-seven thousand, four hundred four".