172066680 has 160 divisors (see below), whose sum is σ = 603741600. Its totient is φ = 43870464.

The previous prime is 172066669. The next prime is 172066691. The reversal of 172066680 is 86660271.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (172066669) and next prime (172066691).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 73366 + ... + 75674.

It is an arithmetic number, because the mean of its divisors is an integer number (3773385).

Almost surely, 2^172066680 is an apocalyptic number.

172066680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172066680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (301870800).

172066680 is an abundant number, since it is smaller than the sum of its proper divisors (431674920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172066680 is a wasteful number, since it uses less digits than its factorization.

172066680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2355 (or 2342 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 172066680 is about 13117.4189534374. The cubic root of 172066680 is about 556.2016331299.

The spelling of 172066680 in words is "one hundred seventy-two million, sixty-six thousand, six hundred eighty".