78668953087 has 2 divisors, whose sum is σ = 78668953088. Its totient is φ = 78668953086.

The previous prime is 78668953079. The next prime is 78668953169. The reversal of 78668953087 is 78035986687.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78668953087 - 2³ = 78668953079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78668953037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39334476543 + 39334476544.

It is an arithmetic number, because the mean of its divisors is an integer number (39334476544).

Almost surely, 2^78668953087 is an apocalyptic number.

78668953087 is a deficient number, since it is larger than the sum of its proper divisors (1).

78668953087 is an equidigital number, since it uses as much as digits as its factorization.

78668953087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 121927680, while the sum is 67.

The spelling of 78668953087 in words is "seventy-eight billion, six hundred sixty-eight million, nine hundred fifty-three thousand, eighty-seven".