264665880 has 192 divisors, whose sum is σ = 906665760. Its totient is φ = 69424128.

The previous prime is 264665867. The next prime is 264665881. The reversal of 264665880 is 88566462.

264665880 is a `hidden beast` number, since 2 + 6 + 4 + 66 + 588 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264665881) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 709374 + ... + 709746.

Almost surely, 2^264665880 is an apocalyptic number.

264665880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 264665880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (453332880).

264665880 is an abundant number, since it is smaller than the sum of its proper divisors (641999880).

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

264665880 is a wasteful number, since it uses less digits than its factorization.

264665880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472 (or 456 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The square root of 264665880 is about 16268.5549450466. The cubic root of 264665880 is about 642.0457649269.

The spelling of 264665880 in words is "two hundred sixty-four million, six hundred sixty-five thousand, eight hundred eighty".