70661320704 has 624 divisors, whose sum is σ = 235087204352. Its totient is φ = 21069103104.

The previous prime is 70661320703. The next prime is 70661320711. The reversal of 70661320704 is 40702316607.

It is a tau number, because it is divible by the number of its divisors (624).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (70661320703) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 556388289 + ... + 556388415.

Almost surely, 2^70661320704 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 70661320704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117543602176).

70661320704 is an abundant number, since it is smaller than the sum of its proper divisors (164425883648).

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

70661320704 is a wasteful number, since it uses less digits than its factorization.

70661320704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222 (or 188 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The spelling of 70661320704 in words is "seventy billion, six hundred sixty-one million, three hundred twenty thousand, seven hundred four".