660272904 has 64 divisors (see below), whose sum is σ = 1840176000. Its totient is φ = 219360960.

The previous prime is 660272867. The next prime is 660272917. The reversal of 660272904 is 409272066.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62262 + ... + 72090.

It is an arithmetic number, because the mean of its divisors is an integer number (28752750).

Almost surely, 2^660272904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 660272904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (920088000).

660272904 is an abundant number, since it is smaller than the sum of its proper divisors (1179903096).

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

660272904 is a wasteful number, since it uses less digits than its factorization.

660272904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10155 (or 10145 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 660272904 is about 25695.7759952876. The cubic root of 660272904 is about 870.7787557431.

The spelling of 660272904 in words is "six hundred sixty million, two hundred seventy-two thousand, nine hundred four".