660779053 has 8 divisors (see below), whose sum is σ = 724834656. Its totient is φ = 597387600.

The previous prime is 660779051. The next prime is 660779081. The reversal of 660779053 is 350977066.

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

It is a cyclic number.

It is not a de Polignac number, because 660779053 - 2¹ = 660779051 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660779051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163951 + ... + 167932.

It is an arithmetic number, because the mean of its divisors is an integer number (90604332).

Almost surely, 2^660779053 is an apocalyptic number.

It is an amenable number.

660779053 is a deficient number, since it is larger than the sum of its proper divisors (64055603).

660779053 is a wasteful number, since it uses less digits than its factorization.

660779053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332075.

The product of its (nonzero) digits is 238140, while the sum is 43.

The square root of 660779053 is about 25705.6229840866. The cubic root of 660779053 is about 871.0012047843.

The spelling of 660779053 in words is "six hundred sixty million, seven hundred seventy-nine thousand, fifty-three".