166387607 has 2 divisors, whose sum is σ = 166387608. Its totient is φ = 166387606.

The previous prime is 166387603. The next prime is 166387643. The reversal of 166387607 is 706783661.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (706783661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166387607 - 2² = 166387603 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166387603) by changing a digit.

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 as a sum of consecutive naturals, namely, 83193803 + 83193804.

It is an arithmetic number, because the mean of its divisors is an integer number (83193804).

Almost surely, 2^166387607 is an apocalyptic number.

166387607 is a deficient number, since it is larger than the sum of its proper divisors (1).

166387607 is an equidigital number, since it uses as much as digits as its factorization.

166387607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 44.

The square root of 166387607 is about 12899.1320250628. The cubic root of 166387607 is about 550.0138916601.

The spelling of 166387607 in words is "one hundred sixty-six million, three hundred eighty-seven thousand, six hundred seven".