76665679 has 2 divisors, whose sum is σ = 76665680. Its totient is φ = 76665678.

The previous prime is 76665637. The next prime is 76665707. The reversal of 76665679 is 97656667.

It is a strong prime.

It is an emirp because it is prime and its reverse (97656667) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 76665679 - 2⁹ = 76665167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76665619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38332839 + 38332840.

It is an arithmetic number, because the mean of its divisors is an integer number (38332840).

Almost surely, 2^76665679 is an apocalyptic number.

76665679 is a deficient number, since it is larger than the sum of its proper divisors (1).

76665679 is an equidigital number, since it uses as much as digits as its factorization.

76665679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2857680, while the sum is 52.

The square root of 76665679 is about 8755.8939577864. The cubic root of 76665679 is about 424.8154751433.

The spelling of 76665679 in words is "seventy-six million, six hundred sixty-five thousand, six hundred seventy-nine".