66574337 has 2 divisors, whose sum is σ = 66574338. Its totient is φ = 66574336.

The previous prime is 66574303. The next prime is 66574369. The reversal of 66574337 is 73347566.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64625521 + 1948816 = 8039^2 + 1396^2 .

It is a cyclic number.

It is not a de Polignac number, because 66574337 - 2⁶ = 66574273 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66574294 and 66574303.

It is not a weakly prime, because it can be changed into another prime (66574237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33287168 + 33287169.

It is an arithmetic number, because the mean of its divisors is an integer number (33287169).

Almost surely, 2^66574337 is an apocalyptic number.

It is an amenable number.

66574337 is a deficient number, since it is larger than the sum of its proper divisors (1).

66574337 is an equidigital number, since it uses as much as digits as its factorization.

66574337 is an evil number, because the sum of its binary digits is even.

The product of its digits is 317520, while the sum is 41.

The square root of 66574337 is about 8159.3098360094. The cubic root of 66574337 is about 405.2928573285.

The spelling of 66574337 in words is "sixty-six million, five hundred seventy-four thousand, three hundred thirty-seven".