172066605 has 16 divisors (see below), whose sum is σ = 291501504. Its totient is φ = 86370560.

The previous prime is 172066591. The next prime is 172066633. The reversal of 172066605 is 506660271.

It is not a de Polignac number, because 172066605 - 2⁴ = 172066589 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 337131 + ... + 337640.

It is an arithmetic number, because the mean of its divisors is an integer number (18218844).

Almost surely, 2^172066605 is an apocalyptic number.

172066605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

172066605 is a deficient number, since it is larger than the sum of its proper divisors (119434899).

172066605 is a wasteful number, since it uses less digits than its factorization.

172066605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674796.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 172066605 is about 13117.4160946430. The cubic root of 172066605 is about 556.2015523180.

The spelling of 172066605 in words is "one hundred seventy-two million, sixty-six thousand, six hundred five".