164616566 has 32 divisors (see below), whose sum is σ = 264176640. Its totient is φ = 76766976.

The previous prime is 164616563. The next prime is 164616577. The reversal of 164616566 is 665616461.

It is a super-4 number, since 4×164616566⁴ (a number of 34 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164616563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 352265 + ... + 352731.

It is an arithmetic number, because the mean of its divisors is an integer number (8255520).

Almost surely, 2^164616566 is an apocalyptic number.

164616566 is a deficient number, since it is larger than the sum of its proper divisors (99560074).

164616566 is a wasteful number, since it uses less digits than its factorization.

164616566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668.

The product of its digits is 155520, while the sum is 41.

The square root of 164616566 is about 12830.2987494446. The cubic root of 164616566 is about 548.0554648426.

The spelling of 164616566 in words is "one hundred sixty-four million, six hundred sixteen thousand, five hundred sixty-six".