79221264667 has 2 divisors, whose sum is σ = 79221264668. Its totient is φ = 79221264666.

The previous prime is 79221264631. The next prime is 79221264719. The reversal of 79221264667 is 76646212297.

It is an a-pointer prime, because the next prime (79221264719) can be obtained adding 79221264667 to its sum of digits (52).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 79221264667 - 2³⁵ = 44861526299 is a prime.

It is not a weakly prime, because it can be changed into another prime (79221262667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39610632333 + 39610632334.

It is an arithmetic number, because the mean of its divisors is an integer number (39610632334).

Almost surely, 2^79221264667 is an apocalyptic number.

79221264667 is a deficient number, since it is larger than the sum of its proper divisors (1).

79221264667 is an equidigital number, since it uses as much as digits as its factorization.

79221264667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3048192, while the sum is 52.

The spelling of 79221264667 in words is "seventy-nine billion, two hundred twenty-one million, two hundred sixty-four thousand, six hundred sixty-seven".