70006608721 has 4 divisors (see below), whose sum is σ = 80007552832. Its totient is φ = 60005664612.

The previous prime is 70006608691. The next prime is 70006608733. The reversal of 70006608721 is 12780660007.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 70006608721 - 2⁵ = 70006608689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70006606721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5000472045 + ... + 5000472058.

It is an arithmetic number, because the mean of its divisors is an integer number (20001888208).

Almost surely, 2^70006608721 is an apocalyptic number.

It is an amenable number.

70006608721 is a deficient number, since it is larger than the sum of its proper divisors (10000944111).

70006608721 is a wasteful number, since it uses less digits than its factorization.

70006608721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10000944110.

The product of its (nonzero) digits is 28224, while the sum is 37.

The spelling of 70006608721 in words is "seventy billion, six million, six hundred eight thousand, seven hundred twenty-one".