661053260 has 48 divisors (see below), whose sum is σ = 1641245760. Its totient is φ = 218830080.

The previous prime is 661053257. The next prime is 661053293. The reversal of 661053260 is 62350166.

It is a Harshad number since it is a multiple of its sum of digits (29).

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, 77351 + ... + 85470.

It is an arithmetic number, because the mean of its divisors is an integer number (34192620).

Almost surely, 2^661053260 is an apocalyptic number.

It is an amenable number.

661053260 is an abundant number, since it is smaller than the sum of its proper divisors (980192500).

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

661053260 is a wasteful number, since it uses less digits than its factorization.

661053260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162866 (or 162864 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 661053260 is about 25710.9560304552. The cubic root of 661053260 is about 871.1216694575.

The spelling of 661053260 in words is "six hundred sixty-one million, fifty-three thousand, two hundred sixty".