166053690 has 96 divisors (see below), whose sum is σ = 482594112. Its totient is φ = 39264000.

The previous prime is 166053689. The next prime is 166053697. The reversal of 166053690 is 96350661.

166053690 is a `hidden beast` number, since 16 + 605 + 36 + 9 + 0 = 666.

It is a super-2 number, since 2×166053690² = 55147655925232200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (166053697) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 38545 + ... + 42635.

It is an arithmetic number, because the mean of its divisors is an integer number (5027022).

Almost surely, 2^166053690 is an apocalyptic number.

166053690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 166053690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241297056).

166053690 is an abundant number, since it is smaller than the sum of its proper divisors (316540422).

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

166053690 is a wasteful number, since it uses less digits than its factorization.

166053690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4156 (or 4153 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 166053690 is about 12886.1821343639. The cubic root of 166053690 is about 549.6457112238.

The spelling of 166053690 in words is "one hundred sixty-six million, fifty-three thousand, six hundred ninety".