661960292 has 48 divisors (see below), whose sum is σ = 1341204480. Its totient is φ = 280020000.

The previous prime is 661960289. The next prime is 661960319. The reversal of 661960292 is 292069166.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

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, 920309 + ... + 921027.

It is an arithmetic number, because the mean of its divisors is an integer number (27941760).

Almost surely, 2^661960292 is an apocalyptic number.

It is an amenable number.

661960292 is an abundant number, since it is smaller than the sum of its proper divisors (679244188).

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

661960292 is a wasteful number, since it uses less digits than its factorization.

661960292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112 (or 1110 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 661960292 is about 25728.5890013425. The cubic root of 661960292 is about 871.5199097463.

The spelling of 661960292 in words is "six hundred sixty-one million, nine hundred sixty thousand, two hundred ninety-two".