164685685 has 8 divisors (see below), whose sum is σ = 197822880. Its totient is φ = 131615184.

The previous prime is 164685683. The next prime is 164685709. The reversal of 164685685 is 586586461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 164685685 - 2¹ = 164685683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164685683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11067 + ... + 21256.

It is an arithmetic number, because the mean of its divisors is an integer number (24727860).

Almost surely, 2^164685685 is an apocalyptic number.

It is an amenable number.

164685685 is a deficient number, since it is larger than the sum of its proper divisors (33137195).

164685685 is a wasteful number, since it uses less digits than its factorization.

164685685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33347.

The product of its digits is 1382400, while the sum is 49.

The square root of 164685685 is about 12832.9920517391. The cubic root of 164685685 is about 548.1321597262.

The spelling of 164685685 in words is "one hundred sixty-four million, six hundred eighty-five thousand, six hundred eighty-five".