67878412556 has 12 divisors (see below), whose sum is σ = 118789310640. Its totient is φ = 33938609520.

The previous prime is 67878412523. The next prime is 67878412573. The reversal of 67878412556 is 65521487876.

It is a super-2 number, since 2×67878412556² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 67878412495 and 67878412504.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194930 + ... + 416838.

It is an arithmetic number, because the mean of its divisors is an integer number (9899109220).

Almost surely, 2^67878412556 is an apocalyptic number.

It is an amenable number.

67878412556 is a deficient number, since it is larger than the sum of its proper divisors (50910898084).

67878412556 is a wasteful number, since it uses less digits than its factorization.

67878412556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298384 (or 298382 counting only the distinct ones).

The product of its digits is 22579200, while the sum is 59.

The spelling of 67878412556 in words is "sixty-seven billion, eight hundred seventy-eight million, four hundred twelve thousand, five hundred fifty-six".