70921166399 has 2 divisors, whose sum is σ = 70921166400. Its totient is φ = 70921166398.

The previous prime is 70921166383. The next prime is 70921166401. The reversal of 70921166399 is 99366112907.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 70921166399 - 2⁴ = 70921166383 is a prime.

Together with 70921166401, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 70921166399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70921166359) 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, 35460583199 + 35460583200.

It is an arithmetic number, because the mean of its divisors is an integer number (35460583200).

Almost surely, 2^70921166399 is an apocalyptic number.

70921166399 is a deficient number, since it is larger than the sum of its proper divisors (1).

70921166399 is an equidigital number, since it uses as much as digits as its factorization.

70921166399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1102248, while the sum is 53.

The spelling of 70921166399 in words is "seventy billion, nine hundred twenty-one million, one hundred sixty-six thousand, three hundred ninety-nine".