660479285 has 8 divisors (see below), whose sum is σ = 797824896. Its totient is φ = 524883600.

The previous prime is 660479279. The next prime is 660479333. The reversal of 660479285 is 582974066.

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

It is not a de Polignac number, because 660479285 - 2¹⁰ = 660478261 is a prime.

It is a super-2 number, since 2×660479285² = 872465771828222450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 436649 + ... + 438158.

It is an arithmetic number, because the mean of its divisors is an integer number (99728112).

Almost surely, 2^660479285 is an apocalyptic number.

It is an amenable number.

660479285 is a deficient number, since it is larger than the sum of its proper divisors (137345611).

660479285 is a wasteful number, since it uses less digits than its factorization.

660479285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874963.

The product of its (nonzero) digits is 725760, while the sum is 47.

The square root of 660479285 is about 25699.7915361195. The cubic root of 660479285 is about 870.8694725100.

The spelling of 660479285 in words is "six hundred sixty million, four hundred seventy-nine thousand, two hundred eighty-five".