660902420 has 24 divisors (see below), whose sum is σ = 1388524200. Its totient is φ = 264241152.

The previous prime is 660902393. The next prime is 660902443. The reversal of 660902420 is 24209066.

It can be written as a sum of positive squares in 4 ways, for example, as 23541904 + 637360516 = 4852^2 + 25246^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47636 + ... + 59924.

It is an arithmetic number, because the mean of its divisors is an integer number (57855175).

Almost surely, 2^660902420 is an apocalyptic number.

It is an amenable number.

660902420 is an abundant number, since it is smaller than the sum of its proper divisors (727621780).

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

660902420 is a wasteful number, since it uses less digits than its factorization.

660902420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14987 (or 14985 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 660902420 is about 25708.0224832639. The cubic root of 660902420 is about 871.0554065222.

The spelling of 660902420 in words is "six hundred sixty million, nine hundred two thousand, four hundred twenty".