166540612 has 36 divisors (see below), whose sum is σ = 340720464. Its totient is φ = 71018640.

The previous prime is 166540607. The next prime is 166540613. The reversal of 166540612 is 216045661.

166540612 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (166540613) 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, 39343 + ... + 43369.

Almost surely, 2^166540612 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 166540612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170360232).

166540612 is an abundant number, since it is smaller than the sum of its proper divisors (174179852).

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

166540612 is a wasteful number, since it uses less digits than its factorization.

166540612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4256 (or 4247 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 166540612 is about 12905.0614876489. The cubic root of 166540612 is about 550.1824320436.

The spelling of 166540612 in words is "one hundred sixty-six million, five hundred forty thousand, six hundred twelve".