164660651 has 4 divisors (see below), whose sum is σ = 165845400. Its totient is φ = 163475904.

The previous prime is 164660647. The next prime is 164660659. The reversal of 164660651 is 156066461.

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

It is a cyclic number.

It is not a de Polignac number, because 164660651 - 2² = 164660647 is a prime.

It is a super-2 number, since 2×164660651² = 54226259975487602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164660659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 592166 + ... + 592443.

It is an arithmetic number, because the mean of its divisors is an integer number (41461350).

Almost surely, 2^164660651 is an apocalyptic number.

164660651 is a deficient number, since it is larger than the sum of its proper divisors (1184749).

164660651 is a wasteful number, since it uses less digits than its factorization.

164660651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1184748.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 164660651 is about 12832.0166380815. The cubic root of 164660651 is about 548.1043843191.

The spelling of 164660651 in words is "one hundred sixty-four million, six hundred sixty thousand, six hundred fifty-one".