172006680 has 64 divisors (see below), whose sum is σ = 546380640. Its totient is φ = 43169792.

The previous prime is 172006669. The next prime is 172006691. The reversal of 172006680 is 86600271.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (172006669) and next prime (172006691).

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 40119 + ... + 44198.

Almost surely, 2^172006680 is an apocalyptic number.

172006680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172006680 is an abundant number, since it is smaller than the sum of its proper divisors (374373960).

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

172006680 is a wasteful number, since it uses less digits than its factorization.

172006680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84348 (or 84344 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 172006680 is about 13115.1317187438. The cubic root of 172006680 is about 556.1369760684.

The spelling of 172006680 in words is "one hundred seventy-two million, six thousand, six hundred eighty".