166166751 has 8 divisors (see below), whose sum is σ = 222524080. Its totient is φ = 110293632.

The previous prime is 166166731. The next prime is 166166771. The reversal of 166166751 is 157661661.

It is an interprime number because it is at equal distance from previous prime (166166731) and next prime (166166771).

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

It is not a de Polignac number, because 166166751 - 2²¹ = 164069599 is a prime.

It is a super-2 number, since 2×166166751² = 55222778275792002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166166701) 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, 120250 + ... + 121623.

It is an arithmetic number, because the mean of its divisors is an integer number (27815510).

Almost surely, 2^166166751 is an apocalyptic number.

166166751 is a deficient number, since it is larger than the sum of its proper divisors (56357329).

166166751 is a wasteful number, since it uses less digits than its factorization.

166166751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242105.

The product of its digits is 45360, while the sum is 39.

The square root of 166166751 is about 12890.5682962389. The cubic root of 166166751 is about 549.7704287076.

The spelling of 166166751 in words is "one hundred sixty-six million, one hundred sixty-six thousand, seven hundred fifty-one".