67400740656 has 80 divisors (see below), whose sum is σ = 193558271200. Its totient is φ = 22456092672.

The previous prime is 67400740621. The next prime is 67400740663. The reversal of 67400740656 is 65604700476.

It is a happy 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, 886680 + ... + 959688.

It is an arithmetic number, because the mean of its divisors is an integer number (2419478390).

Almost surely, 2^67400740656 is an apocalyptic number.

It is an amenable number.

67400740656 is an abundant number, since it is smaller than the sum of its proper divisors (126157530544).

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

67400740656 is a wasteful number, since it uses less digits than its factorization.

67400740656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75163 (or 75151 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 45.

The spelling of 67400740656 in words is "sixty-seven billion, four hundred million, seven hundred forty thousand, six hundred fifty-six".