166364542021044 has 24 divisors (see below), whose sum is σ = 388200949422048. Its totient is φ = 55452416191840.

The previous prime is 166364542021043. The next prime is 166364542021079. The reversal of 166364542021044 is 440120245463661.

It is a junction number, because it is equal to n+sod(n) for n = 166364542020984 and 166364542021002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166364542021043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 303608427 + ... + 304155890.

It is an arithmetic number, because the mean of its divisors is an integer number (16175039559252).

Almost surely, 2^{166364542021044} is an apocalyptic number.

It is an amenable number.

166364542021044 is an abundant number, since it is smaller than the sum of its proper divisors (221836407401004).

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

166364542021044 is a wasteful number, since it uses less digits than its factorization.

166364542021044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607787135 (or 607787133 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 48.

The spelling of 166364542021044 in words is "one hundred sixty-six trillion, three hundred sixty-four billion, five hundred forty-two million, twenty-one thousand, forty-four".