551980664 has 32 divisors (see below), whose sum is σ = 1074589200. Its totient is φ = 265493760.

The previous prime is 551980621. The next prime is 551980669. The reversal of 551980664 is 466089155.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551980669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60959 + ... + 69425.

Almost surely, 2^551980664 is an apocalyptic number.

It is an amenable number.

551980664 is a deficient number, since it is larger than the sum of its proper divisors (522608536).

551980664 is a wasteful number, since it uses less digits than its factorization.

551980664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8783 (or 8779 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 551980664 is about 23494.2687479308. The cubic root of 551980664 is about 820.3036075824.

The spelling of 551980664 in words is "five hundred fifty-one million, nine hundred eighty thousand, six hundred sixty-four".