551066664 has 32 divisors (see below), whose sum is σ = 1422109440. Its totient is φ = 177763200.

The previous prime is 551066657. The next prime is 551066689. The reversal of 551066664 is 466660155.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 369597 + ... + 371084.

It is an arithmetic number, because the mean of its divisors is an integer number (44440920).

Almost surely, 2^551066664 is an apocalyptic number.

It is an amenable number.

551066664 is an abundant number, since it is smaller than the sum of its proper divisors (871042776).

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

551066664 is a wasteful number, since it uses less digits than its factorization.

551066664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740721 (or 740717 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

The square root of 551066664 is about 23474.8091366043. The cubic root of 551066664 is about 819.8505894743.

The spelling of 551066664 in words is "five hundred fifty-one million, sixty-six thousand, six hundred sixty-four".