667142627 has 2 divisors, whose sum is σ = 667142628. Its totient is φ = 667142626.

The previous prime is 667142617. The next prime is 667142647. The reversal of 667142627 is 726241766.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 667142627 - 2¹⁸ = 666880483 is a prime.

It is a super-2 number, since 2×667142627² = 890158569520922258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (667142617) by changing a digit.

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 as a sum of consecutive naturals, namely, 333571313 + 333571314.

It is an arithmetic number, because the mean of its divisors is an integer number (333571314).

Almost surely, 2^667142627 is an apocalyptic number.

667142627 is a deficient number, since it is larger than the sum of its proper divisors (1).

667142627 is an equidigital number, since it uses as much as digits as its factorization.

667142627 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 41.

The square root of 667142627 is about 25829.1042624401. The cubic root of 667142627 is about 873.7883101057.

The spelling of 667142627 in words is "six hundred sixty-seven million, one hundred forty-two thousand, six hundred twenty-seven".