172006678 has 8 divisors (see below), whose sum is σ = 258214968. Its totient is φ = 85935024.

The previous prime is 172006669. The next prime is 172006691. The reversal of 172006678 is 876600271.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30951 + ... + 36082.

It is an arithmetic number, because the mean of its divisors is an integer number (32276871).

Almost surely, 2^172006678 is an apocalyptic number.

172006678 is a deficient number, since it is larger than the sum of its proper divisors (86208290).

172006678 is a wasteful number, since it uses less digits than its factorization.

172006678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68318.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 172006678 is about 13115.1316424960. The cubic root of 172006678 is about 556.1369739129.

The spelling of 172006678 in words is "one hundred seventy-two million, six thousand, six hundred seventy-eight".