164220651 has 12 divisors (see below), whose sum is σ = 271094512. Its totient is φ = 93840336.

The previous prime is 164220643. The next prime is 164220673. The reversal of 164220651 is 156022461.

164220651 is a `hidden beast` number, since 1 + 6 + 4 + 2 + 2 + 0 + 651 = 666.

It is not a de Polignac number, because 164220651 - 2³ = 164220643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164220611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1303276 + ... + 1303401.

Almost surely, 2^164220651 is an apocalyptic number.

164220651 is a deficient number, since it is larger than the sum of its proper divisors (106873861).

164220651 is a wasteful number, since it uses less digits than its factorization.

164220651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2606690 (or 2606687 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 164220651 is about 12814.8605532795. The cubic root of 164220651 is about 547.6157408401.

The spelling of 164220651 in words is "one hundred sixty-four million, two hundred twenty thousand, six hundred fifty-one".