264661887 has 32 divisors (see below), whose sum is σ = 433216000. Its totient is φ = 143265024.

The previous prime is 264661879. The next prime is 264661889. The reversal of 264661887 is 788166462.

It is not a de Polignac number, because 264661887 - 2³ = 264661879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264661889) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12783 + ... + 26319.

It is an arithmetic number, because the mean of its divisors is an integer number (13538000).

Almost surely, 2^264661887 is an apocalyptic number.

264661887 is a deficient number, since it is larger than the sum of its proper divisors (168554113).

264661887 is a wasteful number, since it uses less digits than its factorization.

264661887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13580 (or 13566 counting only the distinct ones).

The product of its digits is 774144, while the sum is 48.

The square root of 264661887 is about 16268.4322231738. The cubic root of 264661887 is about 642.0425360740.

The spelling of 264661887 in words is "two hundred sixty-four million, six hundred sixty-one thousand, eight hundred eighty-seven".