164671651 has 8 divisors (see below), whose sum is σ = 180875520. Its totient is φ = 149221512.

The previous prime is 164671643. The next prime is 164671669. The reversal of 164671651 is 156176461.

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 164671651 - 2³ = 164671643 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 164671651.

It is not an unprimeable number, because it can be changed into a prime (164671151) 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, 187975 + ... + 188848.

It is an arithmetic number, because the mean of its divisors is an integer number (22609440).

Almost surely, 2^164671651 is an apocalyptic number.

164671651 is a deficient number, since it is larger than the sum of its proper divisors (16203869).

164671651 is a wasteful number, since it uses less digits than its factorization.

164671651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376865.

The product of its digits is 30240, while the sum is 37.

The square root of 164671651 is about 12832.4452463278. The cubic root of 164671651 is about 548.1165892467.

The spelling of 164671651 in words is "one hundred sixty-four million, six hundred seventy-one thousand, six hundred fifty-one".