70670036778 has 64 divisors (see below), whose sum is σ = 158525503488. Its totient is φ = 20814131520.

The previous prime is 70670036777. The next prime is 70670036797. The reversal of 70670036778 is 87763007607.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 70670036778.

It is not an unprimeable number, because it can be changed into a prime (70670036771) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2346451 + ... + 2376377.

It is an arithmetic number, because the mean of its divisors is an integer number (2476960992).

Almost surely, 2^70670036778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70670036778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79262751744).

70670036778 is an abundant number, since it is smaller than the sum of its proper divisors (87855466710).

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

70670036778 is a wasteful number, since it uses less digits than its factorization.

70670036778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30947.

The product of its (nonzero) digits is 2074464, while the sum is 51.

The spelling of 70670036778 in words is "seventy billion, six hundred seventy million, thirty-six thousand, seven hundred seventy-eight".