166667497 has 8 divisors (see below), whose sum is σ = 167580000. Its totient is φ = 165758304.

The previous prime is 166667491. The next prime is 166667509. The reversal of 166667497 is 794766661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 166667497 - 2³ = 166667489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166667491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 283638 + ... + 284224.

It is an arithmetic number, because the mean of its divisors is an integer number (20947500).

Almost surely, 2^166667497 is an apocalyptic number.

It is an amenable number.

166667497 is a deficient number, since it is larger than the sum of its proper divisors (912503).

166667497 is an equidigital number, since it uses as much as digits as its factorization.

166667497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1655.

The product of its digits is 2286144, while the sum is 52.

The square root of 166667497 is about 12909.9766459897. The cubic root of 166667497 is about 550.3221220477.

The spelling of 166667497 in words is "one hundred sixty-six million, six hundred sixty-seven thousand, four hundred ninety-seven".