166927640 has 64 divisors (see below), whose sum is σ = 415424160. Its totient is φ = 59857920.

The previous prime is 166927637. The next prime is 166927643. The reversal of 166927640 is 46729661.

166927640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (166927637) and next prime (166927643).

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166927643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29522 + ... + 34718.

Almost surely, 2^166927640 is an apocalyptic number.

166927640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166927640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (207712080).

166927640 is an abundant number, since it is smaller than the sum of its proper divisors (248496520).

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

166927640 is a wasteful number, since it uses less digits than its factorization.

166927640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5292 (or 5288 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 166927640 is about 12920.0479875270. The cubic root of 166927640 is about 550.6082966765.

The spelling of 166927640 in words is "one hundred sixty-six million, nine hundred twenty-seven thousand, six hundred forty".