166667788 has 36 divisors (see below), whose sum is σ = 341760496. Its totient is φ = 69667200.

The previous prime is 166667783. The next prime is 166667789. The reversal of 166667788 is 887766661.

166667788 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (166667783) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45298 + ... + 48838.

Almost surely, 2^166667788 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 166667788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170880248).

166667788 is an abundant number, since it is smaller than the sum of its proper divisors (175092708).

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

166667788 is a wasteful number, since it uses less digits than its factorization.

166667788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3634 (or 3591 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 55.

The square root of 166667788 is about 12909.9879163383. The cubic root of 166667788 is about 550.3224423334.

The spelling of 166667788 in words is "one hundred sixty-six million, six hundred sixty-seven thousand, seven hundred eighty-eight".