166081534 has 16 divisors (see below), whose sum is σ = 264059568. Its totient is φ = 78072192.

The previous prime is 166081511. The next prime is 166081547. The reversal of 166081534 is 435180661.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a self number, because there is not a number n which added to its sum of digits gives 166081534.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39229 + ... + 43255.

It is an arithmetic number, because the mean of its divisors is an integer number (16503723).

Almost surely, 2^166081534 is an apocalyptic number.

166081534 is a deficient number, since it is larger than the sum of its proper divisors (97978034).

166081534 is a wasteful number, since it uses less digits than its factorization.

166081534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5259.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 166081534 is about 12887.2624711379. The cubic root of 166081534 is about 549.6764311671.

The spelling of 166081534 in words is "one hundred sixty-six million, eighty-one thousand, five hundred thirty-four".