166320063 has 72 divisors (see below), whose sum is σ = 306157488. Its totient is φ = 86220288.

The previous prime is 166320047. The next prime is 166320071. The reversal of 166320063 is 360023661.

It is not a de Polignac number, because 166320063 - 2⁴ = 166320047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166320083) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 383895 + ... + 384327.

Almost surely, 2^166320063 is an apocalyptic number.

166320063 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

166320063 is a deficient number, since it is larger than the sum of its proper divisors (139837425).

166320063 is a wasteful number, since it uses less digits than its factorization.

166320063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533 (or 523 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 166320063 is about 12896.5135986436. The cubic root of 166320063 is about 549.9394566966.

The spelling of 166320063 in words is "one hundred sixty-six million, three hundred twenty thousand, sixty-three".