672564578 has 16 divisors (see below), whose sum is σ = 1192726080. Its totient is φ = 278302416.

The previous prime is 672564539. The next prime is 672564583. The reversal of 672564578 is 875465276.

It is a super-2 number, since 2×672564578² = 904686223160636168, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 827876 + ... + 828687.

It is an arithmetic number, because the mean of its divisors is an integer number (74545380).

Almost surely, 2^672564578 is an apocalyptic number.

672564578 is a deficient number, since it is larger than the sum of its proper divisors (520161502).

672564578 is a wasteful number, since it uses less digits than its factorization.

672564578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1656601.

The product of its digits is 2822400, while the sum is 50.

The square root of 672564578 is about 25933.8500419818. The cubic root of 672564578 is about 876.1490549654.

The spelling of 672564578 in words is "six hundred seventy-two million, five hundred sixty-four thousand, five hundred seventy-eight".