166172063 has 4 divisors (see below), whose sum is σ = 167785488. Its totient is φ = 164558640.

The previous prime is 166172053. The next prime is 166172099. The reversal of 166172063 is 360271661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 166172063 - 2⁴ = 166172047 is a prime.

It is a super-2 number, since 2×166172063² = 55226309043351938, 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 (166172003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 806558 + ... + 806763.

It is an arithmetic number, because the mean of its divisors is an integer number (41946372).

Almost surely, 2^166172063 is an apocalyptic number.

166172063 is a deficient number, since it is larger than the sum of its proper divisors (1613425).

166172063 is a wasteful number, since it uses less digits than its factorization.

166172063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1613424.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 166172063 is about 12890.7743367107. The cubic root of 166172063 is about 549.7762869783.

The spelling of 166172063 in words is "one hundred sixty-six million, one hundred seventy-two thousand, sixty-three".