667936285 has 8 divisors (see below), whose sum is σ = 801955296. Its totient is φ = 534061200.

The previous prime is 667936249. The next prime is 667936303. The reversal of 667936285 is 582639766.

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

It is not a de Polignac number, because 667936285 - 2⁹ = 667935773 is a prime.

It is a super-2 number, since 2×667936285² = 892277761639202450, 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 (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25491 + ... + 44560.

It is an arithmetic number, because the mean of its divisors is an integer number (100244412).

Almost surely, 2^667936285 is an apocalyptic number.

It is an amenable number.

667936285 is a deficient number, since it is larger than the sum of its proper divisors (134019011).

667936285 is a wasteful number, since it uses less digits than its factorization.

667936285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71963.

The product of its digits is 3265920, while the sum is 52.

The square root of 667936285 is about 25844.4633335653. The cubic root of 667936285 is about 874.1346699573.

The spelling of 667936285 in words is "six hundred sixty-seven million, nine hundred thirty-six thousand, two hundred eighty-five".