164027666625 has 16 divisors (see below), whose sum is σ = 272942037888. Its totient is φ = 87481422000.

The previous prime is 164027666599. The next prime is 164027666659. The reversal of 164027666625 is 526666720461.

It is not a de Polignac number, because 164027666625 - 2¹⁰ = 164027665601 is a prime.

It is a super-4 number, since 4×164027666625⁴ (a number of 46 digits) contains 4444 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 218703181 + ... + 218703930.

It is an arithmetic number, because the mean of its divisors is an integer number (17058877368).

Almost surely, 2^164027666625 is an apocalyptic number.

164027666625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

164027666625 is a deficient number, since it is larger than the sum of its proper divisors (108914371263).

164027666625 is an equidigital number, since it uses as much as digits as its factorization.

164027666625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437407129 (or 437407119 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 51.

The spelling of 164027666625 in words is "one hundred sixty-four billion, twenty-seven million, six hundred sixty-six thousand, six hundred twenty-five".