661142930 has 32 divisors (see below), whose sum is σ = 1369094400. Its totient is φ = 225172800.

The previous prime is 661142929. The next prime is 661142953. The reversal of 661142930 is 39241166.

661142930 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 20705 + ... + 41844.

It is an arithmetic number, because the mean of its divisors is an integer number (42784200).

Almost surely, 2^661142930 is an apocalyptic number.

661142930 is an abundant number, since it is smaller than the sum of its proper divisors (707951470).

661142930 is a wasteful number, since it uses less digits than its factorization.

661142930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62714.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 661142930 is about 25712.6997804587. The cubic root of 661142930 is about 871.1610560713.

The spelling of 661142930 in words is "six hundred sixty-one million, one hundred forty-two thousand, nine hundred thirty".