661066930930 has 32 divisors (see below), whose sum is σ = 1366354212480. Its totient is φ = 225577336320.

The previous prime is 661066930907. The next prime is 661066930967. The reversal of 661066930930 is 39039660166.

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, 22363935 + ... + 22393474.

It is an arithmetic number, because the mean of its divisors is an integer number (42698569140).

Almost surely, 2^661066930930 is an apocalyptic number.

661066930930 is an abundant number, since it is smaller than the sum of its proper divisors (705287281550).

661066930930 is a wasteful number, since it uses less digits than its factorization.

661066930930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44757634.

The product of its (nonzero) digits is 944784, while the sum is 49.

The spelling of 661066930930 in words is "six hundred sixty-one billion, sixty-six million, nine hundred thirty thousand, nine hundred thirty".