661541082 has 16 divisors (see below), whose sum is σ = 1329939840. Its totient is φ = 219370752.

The previous prime is 661541057. The next prime is 661541129. The reversal of 661541082 is 280145166.

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, 284482 + ... + 286797.

It is an arithmetic number, because the mean of its divisors is an integer number (83121240).

Almost surely, 2^661541082 is an apocalyptic number.

661541082 is an abundant number, since it is smaller than the sum of its proper divisors (668398758).

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

661541082 is a wasteful number, since it uses less digits than its factorization.

661541082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571477.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 661541082 is about 25720.4409371224. The cubic root of 661541082 is about 871.3358971922.

The spelling of 661541082 in words is "six hundred sixty-one million, five hundred forty-one thousand, eighty-two".