67700787878 has 12 divisors (see below), whose sum is σ = 106898513460. Its totient is φ = 32068034496.

The previous prime is 67700787877. The next prime is 67700787887. The reversal of 67700787878 is 87878700776.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67700787877) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1582838 + ... + 1625046.

It is an arithmetic number, because the mean of its divisors is an integer number (8908209455).

Almost surely, 2^67700787878 is an apocalyptic number.

67700787878 is a deficient number, since it is larger than the sum of its proper divisors (39197725582).

67700787878 is an frugal number, since it uses more digits than its factorization.

67700787878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84439 (or 42230 counting only the distinct ones).

The product of its (nonzero) digits is 51631104, while the sum is 65.

The spelling of 67700787878 in words is "sixty-seven billion, seven hundred million, seven hundred eighty-seven thousand, eight hundred seventy-eight".