76661191 has 2 divisors, whose sum is σ = 76661192. Its totient is φ = 76661190.

The previous prime is 76661159. The next prime is 76661203. The reversal of 76661191 is 19116667.

It is a strong prime.

It is an emirp because it is prime and its reverse (19116667) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 76661191 - 2⁵ = 76661159 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 76661191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76661491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38330595 + 38330596.

It is an arithmetic number, because the mean of its divisors is an integer number (38330596).

Almost surely, 2^76661191 is an apocalyptic number.

76661191 is a deficient number, since it is larger than the sum of its proper divisors (1).

76661191 is an equidigital number, since it uses as much as digits as its factorization.

76661191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 37.

The square root of 76661191 is about 8755.6376695247. The cubic root of 76661191 is about 424.8071854319.

The spelling of 76661191 in words is "seventy-six million, six hundred sixty-one thousand, one hundred ninety-one".