164637344666 has 16 divisors (see below), whose sum is σ = 257397324288. Its totient is φ = 78889798800.

The previous prime is 164637344623. The next prime is 164637344689. The reversal of 164637344666 is 666443736461.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12884105 + ... + 12896876.

It is an arithmetic number, because the mean of its divisors is an integer number (16087332768).

Almost surely, 2^164637344666 is an apocalyptic number.

164637344666 is a deficient number, since it is larger than the sum of its proper divisors (92759979622).

164637344666 is a wasteful number, since it uses less digits than its factorization.

164637344666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25781117.

The product of its digits is 31352832, while the sum is 56.

The spelling of 164637344666 in words is "one hundred sixty-four billion, six hundred thirty-seven million, three hundred forty-four thousand, six hundred sixty-six".