70664198440 has 72 divisors (see below), whose sum is σ = 174808240110. Its totient is φ = 25689347200.

The previous prime is 70664198431. The next prime is 70664198483. The reversal of 70664198440 is 4489146607.

It can be written as a sum of positive squares in 3 ways, for example, as 70663462276 + 736164 = 265826^2 + 858^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 18491730 + ... + 18495550.

Almost surely, 2^70664198440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70664198440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87404120055).

70664198440 is an abundant number, since it is smaller than the sum of its proper divisors (104144041670).

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

70664198440 is an equidigital number, since it uses as much as digits as its factorization.

70664198440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7675 (or 3839 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 49.

It can be divided in two parts, 706 and 64198440, that added together give a palindrome (64199146).

The spelling of 70664198440 in words is "seventy billion, six hundred sixty-four million, one hundred ninety-eight thousand, four hundred forty".