166712667 has 16 divisors (see below), whose sum is σ = 243008640. Its totient is φ = 100822400.

The previous prime is 166712657. The next prime is 166712681. The reversal of 166712667 is 766217661.

It is a cyclic number.

It is not a de Polignac number, because 166712667 - 2⁶ = 166712603 is a prime.

It is a super-2 number, since 2×166712667² = 55586226676505778, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (166712617) 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 in 15 ways as a sum of consecutive naturals, for example, 11059 + ... + 21347.

It is an arithmetic number, because the mean of its divisors is an integer number (15188040).

Almost surely, 2^166712667 is an apocalyptic number.

166712667 is a deficient number, since it is larger than the sum of its proper divisors (76295973).

166712667 is a wasteful number, since it uses less digits than its factorization.

166712667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10794.

The product of its digits is 127008, while the sum is 42.

The square root of 166712667 is about 12911.7259496939. The cubic root of 166712667 is about 550.3718334099.

The spelling of 166712667 in words is "one hundred sixty-six million, seven hundred twelve thousand, six hundred sixty-seven".