166123667 has 2 divisors, whose sum is σ = 166123668. Its totient is φ = 166123666.

The previous prime is 166123561. The next prime is 166123697. The reversal of 166123667 is 766321661.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166123667 - 2¹² = 166119571 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166123667.

It is not a weakly prime, because it can be changed into another prime (166123697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83061833 + 83061834.

It is an arithmetic number, because the mean of its divisors is an integer number (83061834).

Almost surely, 2^166123667 is an apocalyptic number.

166123667 is a deficient number, since it is larger than the sum of its proper divisors (1).

166123667 is an equidigital number, since it uses as much as digits as its factorization.

166123667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 38.

The square root of 166123667 is about 12888.8970435798. The cubic root of 166123667 is about 549.7229094608.

The spelling of 166123667 in words is "one hundred sixty-six million, one hundred twenty-three thousand, six hundred sixty-seven".