166618522 has 12 divisors (see below), whose sum is σ = 290732490. Its totient is φ = 71407896.

The previous prime is 166618453. The next prime is 166618523. The reversal of 166618522 is 225816661.

It can be written as a sum of positive squares in only one way, i.e., 145467721 + 21150801 = 12061^2 + 4599^2 .

It is not an unprimeable number, because it can be changed into a prime (166618523) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 849997 + ... + 850192.

Almost surely, 2^166618522 is an apocalyptic number.

166618522 is a deficient number, since it is larger than the sum of its proper divisors (124113968).

166618522 is a wasteful number, since it uses less digits than its factorization.

166618522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1700205 (or 1700198 counting only the distinct ones).

The product of its digits is 34560, while the sum is 37.

The square root of 166618522 is about 12908.0797177582. The cubic root of 166618522 is about 550.2682129837.

The spelling of 166618522 in words is "one hundred sixty-six million, six hundred eighteen thousand, five hundred twenty-two".