660789394 has 16 divisors (see below), whose sum is σ = 1004159520. Its totient is φ = 326077920.

The previous prime is 660789343. The next prime is 660789421. The reversal of 660789394 is 493987066.

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, 260854 + ... + 263374.

It is an arithmetic number, because the mean of its divisors is an integer number (62759970).

Almost surely, 2^660789394 is an apocalyptic number.

660789394 is a deficient number, since it is larger than the sum of its proper divisors (343370126).

660789394 is a wasteful number, since it uses less digits than its factorization.

660789394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4185.

The product of its (nonzero) digits is 1959552, while the sum is 52.

The square root of 660789394 is about 25705.8241260614. The cubic root of 660789394 is about 871.0057483991.

The spelling of 660789394 in words is "six hundred sixty million, seven hundred eighty-nine thousand, three hundred ninety-four".