8070786640 has 80 divisors (see below), whose sum is σ = 21494302848. Its totient is φ = 2760795648.

The previous prime is 8070786611. The next prime is 8070786673. The reversal of 8070786640 is 466870708.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 231814 + ... + 264346.

Almost surely, 2^8070786640 is an apocalyptic number.

8070786640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8070786640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10747151424).

8070786640 is an abundant number, since it is smaller than the sum of its proper divisors (13423516208).

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

8070786640 is a wasteful number, since it uses less digits than its factorization.

8070786640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32996 (or 32990 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 46.

The square root of 8070786640 is about 89837.5569569876. The cubic root of 8070786640 is about 2005.8815732596.

The spelling of 8070786640 in words is "eight billion, seventy million, seven hundred eighty-six thousand, six hundred forty".