665001252 has 30 divisors (see below), whose sum is σ = 1738445478. Its totient is φ = 221666976.

The previous prime is 665001221. The next prime is 665001287. The reversal of 665001252 is 252100566.

665001252 is a `hidden beast` number, since 6 + 650 + 0 + 1 + 2 + 5 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 664402176 + 599076 = 25776^2 + 774^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1025913 + ... + 1026560.

Almost surely, 2^665001252 is an apocalyptic number.

It is an amenable number.

665001252 is an abundant number, since it is smaller than the sum of its proper divisors (1073444226).

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

665001252 is a wasteful number, since it uses less digits than its factorization.

665001252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2052489 (or 2052478 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 665001252 is about 25787.6181916826. The cubic root of 665001252 is about 872.8524212930.

The spelling of 665001252 in words is "six hundred sixty-five million, one thousand, two hundred fifty-two".