672521004 has 18 divisors (see below), whose sum is σ = 1699983740. Its totient is φ = 224173656.

The previous prime is 672520997. The next prime is 672521011. The reversal of 672521004 is 400125276.

It is an interprime number because it is at equal distance from previous prime (672520997) and next prime (672521011).

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9340534 + ... + 9340605.

Almost surely, 2^672521004 is an apocalyptic number.

It is an amenable number.

672521004 is an abundant number, since it is smaller than the sum of its proper divisors (1027462736).

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

672521004 is a wasteful number, since it uses less digits than its factorization.

672521004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18681149 (or 18681144 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 672521004 is about 25933.0099294316. The cubic root of 672521004 is about 876.1301332912.

The spelling of 672521004 in words is "six hundred seventy-two million, five hundred twenty-one thousand, four".