172666507 has 8 divisors (see below), whose sum is σ = 186609584. Its totient is φ = 158817888.

The previous prime is 172666453. The next prime is 172666517. The reversal of 172666507 is 705666271.

It is a happy number.

172666507 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 172666507 - 2⁷ = 172666379 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 172666507.

It is not an unprimeable number, because it can be changed into a prime (172666517) 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, 19788 + ... + 27145.

It is an arithmetic number, because the mean of its divisors is an integer number (23326198).

Almost surely, 2^172666507 is an apocalyptic number.

172666507 is a deficient number, since it is larger than the sum of its proper divisors (13943077).

172666507 is a wasteful number, since it uses less digits than its factorization.

172666507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47229.

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 172666507 is about 13140.2628208115. The cubic root of 172666507 is about 556.8471926158.

The spelling of 172666507 in words is "one hundred seventy-two million, six hundred sixty-six thousand, five hundred seven".