166717628 has 96 divisors (see below), whose sum is σ = 395673600. Its totient is φ = 59486400.

The previous prime is 166717627. The next prime is 166717631. The reversal of 166717628 is 826717661.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166717627) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 180953 + ... + 181871.

It is an arithmetic number, because the mean of its divisors is an integer number (4121600).

Almost surely, 2^166717628 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166717628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (197836800).

166717628 is an abundant number, since it is smaller than the sum of its proper divisors (228955972).

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

166717628 is a wasteful number, since it uses less digits than its factorization.

166717628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991 (or 989 counting only the distinct ones).

The product of its digits is 169344, while the sum is 44.

The square root of 166717628 is about 12911.9180604587. The cubic root of 166717628 is about 550.3772926383.

The spelling of 166717628 in words is "one hundred sixty-six million, seven hundred seventeen thousand, six hundred twenty-eight".