667212428115 has 48 divisors (see below), whose sum is σ = 1270299214080. Its totient is φ = 322460550720.

The previous prime is 667212428063. The next prime is 667212428203. The reversal of 667212428115 is 511824212766.

667212428115 is a `hidden beast` number, since 6 + 6 + 7 + 212 + 428 + 1 + 1 + 5 = 666.

It is not a de Polignac number, because 667212428115 - 2¹² = 667212424019 is a prime.

It is a super-2 number, since 2×667212428115² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16944801 + ... + 16984130.

It is an arithmetic number, because the mean of its divisors is an integer number (26464566960).

Almost surely, 2^667212428115 is an apocalyptic number.

667212428115 is a deficient number, since it is larger than the sum of its proper divisors (603086785965).

667212428115 is a wasteful number, since it uses less digits than its factorization.

667212428115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33928984 (or 33928981 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The spelling of 667212428115 in words is "six hundred sixty-seven billion, two hundred twelve million, four hundred twenty-eight thousand, one hundred fifteen".