253125666 has 24 divisors (see below), whose sum is σ = 548746380. Its totient is φ = 84327936.

The previous prime is 253125641. The next prime is 253125673. The reversal of 253125666 is 666521352.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 221146641 + 31979025 = 14871^2 + 5655^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 253125666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46546 + ... + 51698.

Almost surely, 2^253125666 is an apocalyptic number.

253125666 is an abundant number, since it is smaller than the sum of its proper divisors (295620714).

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

253125666 is a wasteful number, since it uses less digits than its factorization.

253125666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7890 (or 7887 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 253125666 is about 15909.9235070443. The cubic root of 253125666 is about 632.5750537671.

The spelling of 253125666 in words is "two hundred fifty-three million, one hundred twenty-five thousand, six hundred sixty-six".