66767039489 has 2 divisors, whose sum is σ = 66767039490. Its totient is φ = 66767039488.

The previous prime is 66767039447. The next prime is 66767039501. The reversal of 66767039489 is 98493076766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47005708864 + 19761330625 = 216808^2 + 140575^2 .

It is a cyclic number.

It is not a de Polignac number, because 66767039489 - 2²⁴ = 66750262273 is a prime.

It is a super-2 number, since 2×66767039489² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66767032489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33383519744 + 33383519745.

It is an arithmetic number, because the mean of its divisors is an integer number (33383519745).

Almost surely, 2^66767039489 is an apocalyptic number.

It is an amenable number.

66767039489 is a deficient number, since it is larger than the sum of its proper divisors (1).

66767039489 is an equidigital number, since it uses as much as digits as its factorization.

66767039489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82301184, while the sum is 65.

The spelling of 66767039489 in words is "sixty-six billion, seven hundred sixty-seven million, thirty-nine thousand, four hundred eighty-nine".