172120766 has 16 divisors (see below), whose sum is σ = 261975168. Its totient is φ = 84804000.

The previous prime is 172120757. The next prime is 172120783. The reversal of 172120766 is 667021271.

172120766 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43136 + ... + 46956.

It is an arithmetic number, because the mean of its divisors is an integer number (16373448).

Almost surely, 2^172120766 is an apocalyptic number.

172120766 is a deficient number, since it is larger than the sum of its proper divisors (89854402).

172120766 is a wasteful number, since it uses less digits than its factorization.

172120766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4147.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 172120766 is about 13119.4804012964. The cubic root of 172120766 is about 556.2599042802.

The spelling of 172120766 in words is "one hundred seventy-two million, one hundred twenty thousand, seven hundred sixty-six".