660912194 has 4 divisors (see below), whose sum is σ = 991368294. Its totient is φ = 330456096.

The previous prime is 660912137. The next prime is 660912211. The reversal of 660912194 is 491219066.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 549292969 + 111619225 = 23437^2 + 10565^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165228047 + ... + 165228050.

Almost surely, 2^660912194 is an apocalyptic number.

660912194 is a deficient number, since it is larger than the sum of its proper divisors (330456100).

660912194 is a wasteful number, since it uses less digits than its factorization.

660912194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330456099.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 660912194 is about 25708.2125788628. The cubic root of 660912194 is about 871.0597004761.

The spelling of 660912194 in words is "six hundred sixty million, nine hundred twelve thousand, one hundred ninety-four".