70221716660 has 24 divisors (see below), whose sum is σ = 147695687496. Its totient is φ = 28044861440.

The previous prime is 70221716639. The next prime is 70221716683. The reversal of 70221716660 is 6661712207.

It can be written as a sum of positive squares in 4 ways, for example, as 25726876816 + 44494839844 = 160396^2 + 210938^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2725937 + ... + 2751576.

It is an arithmetic number, because the mean of its divisors is an integer number (6153986979).

Almost surely, 2^70221716660 is an apocalyptic number.

It is an amenable number.

70221716660 is an abundant number, since it is smaller than the sum of its proper divisors (77473970836).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

70221716660 is a wasteful number, since it uses less digits than its factorization.

70221716660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5478163 (or 5478161 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 38.

The spelling of 70221716660 in words is "seventy billion, two hundred twenty-one million, seven hundred sixteen thousand, six hundred sixty".