661032930 has 32 divisors (see below), whose sum is σ = 1679802624. Its totient is φ = 165906176.

The previous prime is 661032929. The next prime is 661032941. The reversal of 661032930 is 39230166.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 647562 + ... + 648581.

It is an arithmetic number, because the mean of its divisors is an integer number (52493832).

Almost surely, 2^661032930 is an apocalyptic number.

661032930 is an abundant number, since it is smaller than the sum of its proper divisors (1018769694).

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

661032930 is a wasteful number, since it uses less digits than its factorization.

661032930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1296170.

The product of its (nonzero) digits is 5832, while the sum is 30.

The square root of 661032930 is about 25710.5606706661. The cubic root of 661032930 is about 871.1127392214.

The spelling of 661032930 in words is "six hundred sixty-one million, thirty-two thousand, nine hundred thirty".