70677667638 has 20 divisors (see below), whose sum is σ = 158370329700. Its totient is φ = 23559222492.

The previous prime is 70677667609. The next prime is 70677667651. The reversal of 70677667638 is 83676677607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 218140788 + ... + 218141111.

It is an arithmetic number, because the mean of its divisors is an integer number (7918516485).

Almost surely, 2^70677667638 is an apocalyptic number.

70677667638 is an abundant number, since it is smaller than the sum of its proper divisors (87692662062).

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

70677667638 is a wasteful number, since it uses less digits than its factorization.

70677667638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436281913 (or 436281904 counting only the distinct ones).

The product of its (nonzero) digits is 74680704, while the sum is 63.

The spelling of 70677667638 in words is "seventy billion, six hundred seventy-seven million, six hundred sixty-seven thousand, six hundred thirty-eight".