662999904 has 120 divisors (see below), whose sum is σ = 2228477328. Its totient is φ = 189423360.

The previous prime is 662999873. The next prime is 662999921. The reversal of 662999904 is 409999266.

662999904 is a `hidden beast` number, since 6 + 629 + 9 + 9 + 9 + 0 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 127 + ... + 36414.

Almost surely, 2^662999904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 662999904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1114238664).

662999904 is an abundant number, since it is smaller than the sum of its proper divisors (1565477424).

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

662999904 is a wasteful number, since it uses less digits than its factorization.

662999904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36570 (or 36553 counting only the distinct ones).

The product of its (nonzero) digits is 1889568, while the sum is 54.

The square root of 662999904 is about 25748.7845150019. The cubic root of 662999904 is about 871.9759132589.

The spelling of 662999904 in words is "six hundred sixty-two million, nine hundred ninety-nine thousand, nine hundred four".