66031849061 has 2 divisors, whose sum is σ = 66031849062. Its totient is φ = 66031849060.

The previous prime is 66031849049. The next prime is 66031849067. The reversal of 66031849061 is 16094813066.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57720062500 + 8311786561 = 240250^2 + 91169^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66031849061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66031849067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33015924530 + 33015924531.

It is an arithmetic number, because the mean of its divisors is an integer number (33015924531).

Almost surely, 2^66031849061 is an apocalyptic number.

It is an amenable number.

66031849061 is a deficient number, since it is larger than the sum of its proper divisors (1).

66031849061 is an equidigital number, since it uses as much as digits as its factorization.

66031849061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 44.

The spelling of 66031849061 in words is "sixty-six billion, thirty-one million, eight hundred forty-nine thousand, sixty-one".