64675181 has 2 divisors, whose sum is σ = 64675182. Its totient is φ = 64675180.

The previous prime is 64675159. The next prime is 64675201. The reversal of 64675181 is 18157646.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40576900 + 24098281 = 6370^2 + 4909^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64675181 is a prime.

It is a super-2 number, since 2×64675181² = 8365758074765522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64675141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32337590 + 32337591.

It is an arithmetic number, because the mean of its divisors is an integer number (32337591).

Almost surely, 2^64675181 is an apocalyptic number.

It is an amenable number.

64675181 is a deficient number, since it is larger than the sum of its proper divisors (1).

64675181 is an equidigital number, since it uses as much as digits as its factorization.

64675181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 38.

The square root of 64675181 is about 8042.0880994926. The cubic root of 64675181 is about 401.4017093728.

The spelling of 64675181 in words is "sixty-four million, six hundred seventy-five thousand, one hundred eighty-one".