164109566 has 4 divisors (see below), whose sum is σ = 246164352. Its totient is φ = 82054782.

The previous prime is 164109563. The next prime is 164109607. The reversal of 164109566 is 665901461.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164109563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41027390 + ... + 41027393.

It is an arithmetic number, because the mean of its divisors is an integer number (61541088).

Almost surely, 2^164109566 is an apocalyptic number.

164109566 is a deficient number, since it is larger than the sum of its proper divisors (82054786).

164109566 is an equidigital number, since it uses as much as digits as its factorization.

164109566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82054785.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 164109566 is about 12810.5255942135. The cubic root of 164109566 is about 547.4922370548.

The spelling of 164109566 in words is "one hundred sixty-four million, one hundred nine thousand, five hundred sixty-six".