70668721109 has 4 divisors (see below), whose sum is σ = 80764252704. Its totient is φ = 60573189516.

The previous prime is 70668721103. The next prime is 70668721157. The reversal of 70668721109 is 90112786607.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 70668721109 - 2²⁰ = 70667672533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70668721103) 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 in 3 ways as a sum of consecutive naturals, for example, 5047765787 + ... + 5047765800.

It is an arithmetic number, because the mean of its divisors is an integer number (20191063176).

Almost surely, 2^70668721109 is an apocalyptic number.

It is an amenable number.

70668721109 is a deficient number, since it is larger than the sum of its proper divisors (10095531595).

70668721109 is a wasteful number, since it uses less digits than its factorization.

70668721109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10095531594.

The product of its (nonzero) digits is 254016, while the sum is 47.

The spelling of 70668721109 in words is "seventy billion, six hundred sixty-eight million, seven hundred twenty-one thousand, one hundred nine".