666504764 has 24 divisors (see below), whose sum is σ = 1220140320. Its totient is φ = 317965824.

The previous prime is 666504739. The next prime is 666504803. The reversal of 666504764 is 467405666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28772 + ... + 46484.

It is an arithmetic number, because the mean of its divisors is an integer number (50839180).

Almost surely, 2^666504764 is an apocalyptic number.

It is an amenable number.

666504764 is a deficient number, since it is larger than the sum of its proper divisors (553635556).

666504764 is a wasteful number, since it uses less digits than its factorization.

666504764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18149 (or 18147 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 44.

The square root of 666504764 is about 25816.7535526836. The cubic root of 666504764 is about 873.5097415075.

The spelling of 666504764 in words is "six hundred sixty-six million, five hundred four thousand, seven hundred sixty-four".