16618157 has 2 divisors, whose sum is σ = 16618158. Its totient is φ = 16618156.

The previous prime is 16618111. The next prime is 16618159. The reversal of 16618157 is 75181661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8404201 + 8213956 = 2899^2 + 2866^2 .

It is a cyclic number.

It is not a de Polignac number, because 16618157 - 2⁶ = 16618093 is a prime.

Together with 16618159, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16618159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8309078 + 8309079.

It is an arithmetic number, because the mean of its divisors is an integer number (8309079).

Almost surely, 2^16618157 is an apocalyptic number.

It is an amenable number.

16618157 is a deficient number, since it is larger than the sum of its proper divisors (1).

16618157 is an equidigital number, since it uses as much as digits as its factorization.

16618157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 35.

The square root of 16618157 is about 4076.5373787076. The cubic root of 16618157 is about 255.1884138715.

The spelling of 16618157 in words is "sixteen million, six hundred eighteen thousand, one hundred fifty-seven".