66274515737 has 2 divisors, whose sum is σ = 66274515738. Its totient is φ = 66274515736.

The previous prime is 66274515721. The next prime is 66274515757. The reversal of 66274515737 is 73751547266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65599503376 + 675012361 = 256124^2 + 25981^2 .

It is a cyclic number.

It is not a de Polignac number, because 66274515737 - 2⁴ = 66274515721 is a prime.

It is a super-2 number, since 2×66274515737² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66274515757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33137257868 + 33137257869.

It is an arithmetic number, because the mean of its divisors is an integer number (33137257869).

Almost surely, 2^66274515737 is an apocalyptic number.

It is an amenable number.

66274515737 is a deficient number, since it is larger than the sum of its proper divisors (1).

66274515737 is an equidigital number, since it uses as much as digits as its factorization.

66274515737 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7408800, while the sum is 53.

The spelling of 66274515737 in words is "sixty-six billion, two hundred seventy-four million, five hundred fifteen thousand, seven hundred thirty-seven".