172666463 has 4 divisors (see below), whose sum is σ = 172799880. Its totient is φ = 172533048.

The previous prime is 172666453. The next prime is 172666517. The reversal of 172666463 is 364666271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 364666271 = 29 ⋅12574699.

It is a cyclic number.

It is not a de Polignac number, because 172666463 - 2²⁴ = 155889247 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 172666463.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172666423) 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, 64748 + ... + 67361.

It is an arithmetic number, because the mean of its divisors is an integer number (43199970).

Almost surely, 2^172666463 is an apocalyptic number.

172666463 is a deficient number, since it is larger than the sum of its proper divisors (133417).

172666463 is a wasteful number, since it uses less digits than its factorization.

172666463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133416.

The product of its digits is 217728, while the sum is 41.

The square root of 172666463 is about 13140.2611465678. The cubic root of 172666463 is about 556.8471453160.

The spelling of 172666463 in words is "one hundred seventy-two million, six hundred sixty-six thousand, four hundred sixty-three".