16164661 has 2 divisors, whose sum is σ = 16164662. Its totient is φ = 16164660.

The previous prime is 16164647. The next prime is 16164667. The reversal of 16164661 is 16646161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15062161 + 1102500 = 3881^2 + 1050^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16164661 is a prime.

It is a super-2 number, since 2×16164661² = 522592530489842, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16164667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8082330 + 8082331.

It is an arithmetic number, because the mean of its divisors is an integer number (8082331).

Almost surely, 2^16164661 is an apocalyptic number.

It is an amenable number.

16164661 is a deficient number, since it is larger than the sum of its proper divisors (1).

16164661 is an equidigital number, since it uses as much as digits as its factorization.

16164661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 31.

The square root of 16164661 is about 4020.5299401945. The cubic root of 16164661 is about 252.8456775754.

The spelling of 16164661 in words is "sixteen million, one hundred sixty-four thousand, six hundred sixty-one".