660534264 has 192 divisors, whose sum is σ = 2036361600. Its totient is φ = 199345536.

The previous prime is 660534253. The next prime is 660534293. The reversal of 660534264 is 462435066.

660534264 is a `hidden beast` number, since 6 + 60 + 534 + 2 + 64 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1490827 + ... + 1491269.

It is an arithmetic number, because the mean of its divisors is an integer number (10606050).

Almost surely, 2^660534264 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 660534264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1018180800).

660534264 is an abundant number, since it is smaller than the sum of its proper divisors (1375827336).

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

660534264 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (660534263) it forms an eRAP, since the sums of their prime factors are consecutive (535 and 536).

660534264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536 (or 520 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

The square root of 660534264 is about 25700.8611528875. The cubic root of 660534264 is about 870.8936358741.

The spelling of 660534264 in words is "six hundred sixty million, five hundred thirty-four thousand, two hundred sixty-four".