166649463 has 12 divisors (see below), whose sum is σ = 242449480. Its totient is φ = 110299536.

The previous prime is 166649449. The next prime is 166649471. The reversal of 166649463 is 364946661.

It is not a de Polignac number, because 166649463 - 2⁴ = 166649447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166649363) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65356 + ... + 67857.

Almost surely, 2^166649463 is an apocalyptic number.

166649463 is a deficient number, since it is larger than the sum of its proper divisors (75800017).

166649463 is a wasteful number, since it uses less digits than its factorization.

166649463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133358 (or 133355 counting only the distinct ones).

The product of its digits is 559872, while the sum is 45.

The square root of 166649463 is about 12909.2781750182. The cubic root of 166649463 is about 550.3022724123.

The spelling of 166649463 in words is "one hundred sixty-six million, six hundred forty-nine thousand, four hundred sixty-three".