667403804 has 18 divisors (see below), whose sum is σ = 1232666064. Its totient is φ = 316137960.

The previous prime is 667403801. The next prime is 667403809. The reversal of 667403804 is 408304766.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667403801) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 229652 + ... + 232539.

It is an arithmetic number, because the mean of its divisors is an integer number (68481448).

Almost surely, 2^667403804 is an apocalyptic number.

It is an amenable number.

667403804 is a deficient number, since it is larger than the sum of its proper divisors (565262260).

667403804 is a wasteful number, since it uses less digits than its factorization.

667403804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462233 (or 462212 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 38.

The square root of 667403804 is about 25834.1596340969. The cubic root of 667403804 is about 873.9023205266.

The spelling of 667403804 in words is "six hundred sixty-seven million, four hundred three thousand, eight hundred four".