551506664 has 16 divisors (see below), whose sum is σ = 1035900900. Its totient is φ = 275266432.

The previous prime is 551506661. The next prime is 551506667. The reversal of 551506664 is 466605155.

551506664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (551506661) and next prime (551506667).

It can be written as a sum of positive squares in 2 ways, for example, as 474804100 + 76702564 = 21790^2 + 8758^2 .

It is not an unprimeable number, because it can be changed into a prime (551506661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56027 + ... + 65130.

Almost surely, 2^551506664 is an apocalyptic number.

It is an amenable number.

551506664 is a deficient number, since it is larger than the sum of its proper divisors (484394236).

551506664 is a wasteful number, since it uses less digits than its factorization.

551506664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121732 (or 121728 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 38.

The square root of 551506664 is about 23484.1790148176. The cubic root of 551506664 is about 820.0687350671.

The spelling of 551506664 in words is "five hundred fifty-one million, five hundred six thousand, six hundred sixty-four".