164067881 has 2 divisors, whose sum is σ = 164067882. Its totient is φ = 164067880.

The previous prime is 164067863. The next prime is 164067887. The reversal of 164067881 is 188760461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 163968025 + 99856 = 12805^2 + 316^2 .

It is a cyclic number.

It is not a de Polignac number, because 164067881 - 2⁶ = 164067817 is a prime.

It is a super-2 number, since 2×164067881² = 53836539151660322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (164067887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82033940 + 82033941.

It is an arithmetic number, because the mean of its divisors is an integer number (82033941).

Almost surely, 2^164067881 is an apocalyptic number.

It is an amenable number.

164067881 is a deficient number, since it is larger than the sum of its proper divisors (1).

164067881 is an equidigital number, since it uses as much as digits as its factorization.

164067881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 164067881 is about 12808.8985084589. The cubic root of 164067881 is about 547.4458774853.

The spelling of 164067881 in words is "one hundred sixty-four million, sixty-seven thousand, eight hundred eighty-one".