661280232 has 32 divisors (see below), whose sum is σ = 1663740000. Its totient is φ = 219021504.

The previous prime is 661280227. The next prime is 661280281. The reversal of 661280232 is 232082166.

It is a self number, because there is not a number n which added to its sum of digits gives 661280232.

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, 83982 + ... + 91517.

It is an arithmetic number, because the mean of its divisors is an integer number (51991875).

Almost surely, 2^661280232 is an apocalyptic number.

It is an amenable number.

661280232 is an abundant number, since it is smaller than the sum of its proper divisors (1002459768).

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

661280232 is a wasteful number, since it uses less digits than its factorization.

661280232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175665 (or 175661 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 661280232 is about 25715.3695676341. The cubic root of 661280232 is about 871.2213576444.

The spelling of 661280232 in words is "six hundred sixty-one million, two hundred eighty thousand, two hundred thirty-two".