660606394 has 8 divisors (see below), whose sum is σ = 1132468128. Its totient is φ = 283117020.

The previous prime is 660606371. The next prime is 660606403. The reversal of 660606394 is 493606066.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23593072 + ... + 23593099.

It is an arithmetic number, because the mean of its divisors is an integer number (141558516).

Almost surely, 2^660606394 is an apocalyptic number.

660606394 is a deficient number, since it is larger than the sum of its proper divisors (471861734).

660606394 is a wasteful number, since it uses less digits than its factorization.

660606394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47186180.

The product of its (nonzero) digits is 139968, while the sum is 40.

The square root of 660606394 is about 25702.2643749534. The cubic root of 660606394 is about 870.9253350985.

The spelling of 660606394 in words is "six hundred sixty million, six hundred six thousand, three hundred ninety-four".