667814107 has 2 divisors, whose sum is σ = 667814108. Its totient is φ = 667814106.

The previous prime is 667814087. The next prime is 667814113. The reversal of 667814107 is 701418766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 667814107 - 2²⁷ = 533596379 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 667814107.

It is not a weakly prime, because it can be changed into another prime (667814167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333907053 + 333907054.

It is an arithmetic number, because the mean of its divisors is an integer number (333907054).

Almost surely, 2^667814107 is an apocalyptic number.

667814107 is a deficient number, since it is larger than the sum of its proper divisors (1).

667814107 is an equidigital number, since it uses as much as digits as its factorization.

667814107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 667814107 is about 25842.0995083604. The cubic root of 667814107 is about 874.0813681975.

The spelling of 667814107 in words is "six hundred sixty-seven million, eight hundred fourteen thousand, one hundred seven".