660273252 has 12 divisors (see below), whose sum is σ = 1540637616. Its totient is φ = 220091080.

The previous prime is 660273241. The next prime is 660273253. The reversal of 660273252 is 252372066.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (660273253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27511374 + ... + 27511397.

It is an arithmetic number, because the mean of its divisors is an integer number (128386468).

Almost surely, 2^660273252 is an apocalyptic number.

It is an amenable number.

660273252 is an abundant number, since it is smaller than the sum of its proper divisors (880364364).

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

660273252 is a wasteful number, since it uses less digits than its factorization.

660273252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55022778 (or 55022776 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 33.

The square root of 660273252 is about 25695.7827668277. The cubic root of 660273252 is about 870.7789087258.

The spelling of 660273252 in words is "six hundred sixty million, two hundred seventy-three thousand, two hundred fifty-two".