666151215 has 16 divisors (see below), whose sum is σ = 1067515008. Its totient is φ = 354722976.

The previous prime is 666151177. The next prime is 666151237. The reversal of 666151215 is 512151666.

It is not a de Polignac number, because 666151215 - 2⁶ = 666151151 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 24889 + ... + 44178.

It is an arithmetic number, because the mean of its divisors is an integer number (66719688).

Almost surely, 2^666151215 is an apocalyptic number.

666151215 is a deficient number, since it is larger than the sum of its proper divisors (401363793).

666151215 is a wasteful number, since it uses less digits than its factorization.

666151215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69718.

The product of its digits is 10800, while the sum is 33.

The square root of 666151215 is about 25809.9053659637. The cubic root of 666151215 is about 873.3552624326.

The spelling of 666151215 in words is "six hundred sixty-six million, one hundred fifty-one thousand, two hundred fifteen".