78961104667 has 2 divisors, whose sum is σ = 78961104668. Its totient is φ = 78961104666.

The previous prime is 78961104653. The next prime is 78961104689. The reversal of 78961104667 is 76640116987.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78961104667 - 2⁷ = 78961104539 is a prime.

It is a super-3 number, since 3×78961104667³ (a number of 34 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (78961104767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39480552333 + 39480552334.

It is an arithmetic number, because the mean of its divisors is an integer number (39480552334).

Almost surely, 2^78961104667 is an apocalyptic number.

78961104667 is a deficient number, since it is larger than the sum of its proper divisors (1).

78961104667 is an equidigital number, since it uses as much as digits as its factorization.

78961104667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3048192, while the sum is 55.

The spelling of 78961104667 in words is "seventy-eight billion, nine hundred sixty-one million, one hundred four thousand, six hundred sixty-seven".