67290066779 has 4 divisors (see below), whose sum is σ = 72466225776. Its totient is φ = 62113907784.

The previous prime is 67290066773. The next prime is 67290066787. The reversal of 67290066779 is 97766009276.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 67290066779 - 2⁸ = 67290066523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67290066773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2588079479 + ... + 2588079504.

It is an arithmetic number, because the mean of its divisors is an integer number (18116556444).

Almost surely, 2^67290066779 is an apocalyptic number.

67290066779 is a deficient number, since it is larger than the sum of its proper divisors (5176158997).

67290066779 is a wasteful number, since it uses less digits than its factorization.

67290066779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5176158996.

The product of its (nonzero) digits is 12002256, while the sum is 59.

The spelling of 67290066779 in words is "sixty-seven billion, two hundred ninety million, sixty-six thousand, seven hundred seventy-nine".