33668947157 has 2 divisors, whose sum is σ = 33668947158. Its totient is φ = 33668947156.

The previous prime is 33668947063. The next prime is 33668947159. The reversal of 33668947157 is 75174986633.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25576325476 + 8092621681 = 159926^2 + 89959^2 .

It is a cyclic number.

It is not a de Polignac number, because 33668947157 - 2²⁸ = 33400511701 is a prime.

It is a super-2 number, since 2×33668947157² (a number of 22 digits) contains 22 as substring.

Together with 33668947159, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 33668947096 and 33668947105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33668947159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16834473578 + 16834473579.

It is an arithmetic number, because the mean of its divisors is an integer number (16834473579).

Almost surely, 2^33668947157 is an apocalyptic number.

It is an amenable number.

33668947157 is a deficient number, since it is larger than the sum of its proper divisors (1).

33668947157 is an equidigital number, since it uses as much as digits as its factorization.

33668947157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22861440, while the sum is 59.

The spelling of 33668947157 in words is "thirty-three billion, six hundred sixty-eight million, nine hundred forty-seven thousand, one hundred fifty-seven".