266665025 has 48 divisors (see below), whose sum is σ = 376100928. Its totient is φ = 185856000.

The previous prime is 266665001. The next prime is 266665027. The reversal of 266665025 is 520566662.

It is not a de Polignac number, because 266665025 - 2²² = 262470721 is a prime.

It is a super-2 number, since 2×266665025² = 142220471116501250, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 266665025.

It is not an unprimeable number, because it can be changed into a prime (266665027) 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, 755249 + ... + 755601.

It is an arithmetic number, because the mean of its divisors is an integer number (7835436).

Almost surely, 2^266665025 is an apocalyptic number.

266665025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

266665025 is a deficient number, since it is larger than the sum of its proper divisors (109435903).

266665025 is a wasteful number, since it uses less digits than its factorization.

266665025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482 (or 477 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 38.

The square root of 266665025 is about 16329.8813529064. The cubic root of 266665025 is about 643.6582688913.

The spelling of 266665025 in words is "two hundred sixty-six million, six hundred sixty-five thousand, twenty-five".