76766361949 has 2 divisors, whose sum is σ = 76766361950. Its totient is φ = 76766361948.

The previous prime is 76766361911. The next prime is 76766362009. The reversal of 76766361949 is 94916366767.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66435062500 + 10331299449 = 257750^2 + 101643^2 .

It is an emirp because it is prime and its reverse (94916366767) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 76766361949 - 2¹⁵ = 76766329181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76766361149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38383180974 + 38383180975.

It is an arithmetic number, because the mean of its divisors is an integer number (38383180975).

Almost surely, 2^76766361949 is an apocalyptic number.

It is an amenable number.

76766361949 is a deficient number, since it is larger than the sum of its proper divisors (1).

76766361949 is an equidigital number, since it uses as much as digits as its factorization.

76766361949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 61725888, while the sum is 64.

The spelling of 76766361949 in words is "seventy-six billion, seven hundred sixty-six million, three hundred sixty-one thousand, nine hundred forty-nine".