166140684 has 72 divisors (see below), whose sum is σ = 441272832. Its totient is φ = 52604640.

The previous prime is 166140673. The next prime is 166140703. The reversal of 166140684 is 486041661.

166140684 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 134349 + ... + 135579.

Almost surely, 2^166140684 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 166140684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220636416).

166140684 is an abundant number, since it is smaller than the sum of its proper divisors (275132148).

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

166140684 is a wasteful number, since it uses less digits than its factorization.

166140684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1427 (or 1422 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 166140684 is about 12889.5571684988. The cubic root of 166140684 is about 549.7416792434.

The spelling of 166140684 in words is "one hundred sixty-six million, one hundred forty thousand, six hundred eighty-four".