166166240534 has 24 divisors (see below), whose sum is σ = 293436439128. Its totient is φ = 70356098400.

The previous prime is 166166240521. The next prime is 166166240543. The reversal of 166166240534 is 435042661661.

It is a super-2 number, since 2×166166240534² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10206167 + ... + 10222434.

It is an arithmetic number, because the mean of its divisors is an integer number (12226518297).

Almost surely, 2^166166240534 is an apocalyptic number.

166166240534 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

166166240534 is a deficient number, since it is larger than the sum of its proper divisors (127270198594).

166166240534 is a wasteful number, since it uses less digits than its factorization.

166166240534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20428700 (or 20428693 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 44.

The spelling of 166166240534 in words is "one hundred sixty-six billion, one hundred sixty-six million, two hundred forty thousand, five hundred thirty-four".