166544004 has 24 divisors (see below), whose sum is σ = 423930528. Its totient is φ = 50467840.

The previous prime is 166543991. The next prime is 166544011. The reversal of 166544004 is 400445661.

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, 630717 + ... + 630980.

It is an arithmetic number, because the mean of its divisors is an integer number (17663772).

Almost surely, 2^166544004 is an apocalyptic number.

It is an amenable number.

166544004 is an abundant number, since it is smaller than the sum of its proper divisors (257386524).

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

166544004 is a wasteful number, since it uses less digits than its factorization.

166544004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1261715 (or 1261713 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 166544004 is about 12905.1929082831. The cubic root of 166544004 is about 550.1861672809.

Adding to 166544004 its reverse (400445661), we get a palindrome (566989665).

The spelling of 166544004 in words is "one hundred sixty-six million, five hundred forty-four thousand, four".