70211265665 has 4 divisors (see below), whose sum is σ = 84253518804. Its totient is φ = 56169012528.

The previous prime is 70211265661. The next prime is 70211265673. The reversal of 70211265665 is 56656211207.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30578817424 + 39632448241 = 174868^2 + 199079^2 .

It is a cyclic number.

It is not a de Polignac number, because 70211265665 - 2² = 70211265661 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70211265661) 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, 7021126562 + ... + 7021126571.

It is an arithmetic number, because the mean of its divisors is an integer number (21063379701).

Almost surely, 2^70211265665 is an apocalyptic number.

It is an amenable number.

70211265665 is a deficient number, since it is larger than the sum of its proper divisors (14042253139).

70211265665 is a wasteful number, since it uses less digits than its factorization.

70211265665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14042253138.

The product of its (nonzero) digits is 151200, while the sum is 41.

The spelling of 70211265665 in words is "seventy billion, two hundred eleven million, two hundred sixty-five thousand, six hundred sixty-five".