531667664 has 40 divisors (see below), whose sum is σ = 1151176320. Its totient is φ = 235769600.

The previous prime is 531667663. The next prime is 531667681. The reversal of 531667664 is 466766135.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531667663) 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, 29624 + ... + 44055.

It is an arithmetic number, because the mean of its divisors is an integer number (28779408).

Almost surely, 2^531667664 is an apocalyptic number.

It is an amenable number.

531667664 is an abundant number, since it is smaller than the sum of its proper divisors (619508656).

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

531667664 is a wasteful number, since it uses less digits than its factorization.

531667664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73739 (or 73733 counting only the distinct ones).

The product of its digits is 544320, while the sum is 44.

The square root of 531667664 is about 23057.9197674031. The cubic root of 531667664 is about 810.1151408743.

The spelling of 531667664 in words is "five hundred thirty-one million, six hundred sixty-seven thousand, six hundred sixty-four".