66574117 has 2 divisors, whose sum is σ = 66574118. Its totient is φ = 66574116.

The previous prime is 66574097. The next prime is 66574127. The reversal of 66574117 is 71147566.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63584676 + 2989441 = 7974^2 + 1729^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66574117 is a prime.

It is a super-2 number, since 2×66574117² = 8864226108659378, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66574127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33287058 + 33287059.

It is an arithmetic number, because the mean of its divisors is an integer number (33287059).

Almost surely, 2^66574117 is an apocalyptic number.

It is an amenable number.

66574117 is a deficient number, since it is larger than the sum of its proper divisors (1).

66574117 is an equidigital number, since it uses as much as digits as its factorization.

66574117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35280, while the sum is 37.

The square root of 66574117 is about 8159.2963544659. The cubic root of 66574117 is about 405.2924108875.

The spelling of 66574117 in words is "sixty-six million, five hundred seventy-four thousand, one hundred seventeen".