164661451 has 2 divisors, whose sum is σ = 164661452. Its totient is φ = 164661450.

The previous prime is 164661421. The next prime is 164661457. The reversal of 164661451 is 154166461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 164661451 - 2⁹ = 164660939 is a prime.

It is a super-2 number, since 2×164661451² = 54226786890850802, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (164661457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82330725 + 82330726.

It is an arithmetic number, because the mean of its divisors is an integer number (82330726).

Almost surely, 2^164661451 is an apocalyptic number.

164661451 is a deficient number, since it is larger than the sum of its proper divisors (1).

164661451 is an equidigital number, since it uses as much as digits as its factorization.

164661451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 34.

The square root of 164661451 is about 12832.0478100730. The cubic root of 164661451 is about 548.1052719685.

The spelling of 164661451 in words is "one hundred sixty-four million, six hundred sixty-one thousand, four hundred fifty-one".