164664451 has 12 divisors (see below), whose sum is σ = 191759400. Its totient is φ = 140985600.

The previous prime is 164664449. The next prime is 164664473. The reversal of 164664451 is 154466461.

It is not a de Polignac number, because 164664451 - 2¹ = 164664449 is a prime.

It is a super-2 number, since 2×164664451² = 54228762846262802, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 164664451.

It is not an unprimeable number, because it can be changed into a prime (164664491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77400 + ... + 79498.

It is an arithmetic number, because the mean of its divisors is an integer number (15979950).

Almost surely, 2^164664451 is an apocalyptic number.

164664451 is a deficient number, since it is larger than the sum of its proper divisors (27094949).

164664451 is a wasteful number, since it uses less digits than its factorization.

164664451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3714 (or 3707 counting only the distinct ones).

The product of its digits is 69120, while the sum is 37.

The square root of 164664451 is about 12832.1647043669. The cubic root of 164664451 is about 548.1086006283.

The spelling of 164664451 in words is "one hundred sixty-four million, six hundred sixty-four thousand, four hundred fifty-one".