67748406784 has 20 divisors (see below), whose sum is σ = 135364493484. Its totient is φ = 33874203136.

The previous prime is 67748406731. The next prime is 67748406793. The reversal of 67748406784 is 48760484776.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66160042 + ... + 66161065.

Almost surely, 2^67748406784 is an apocalyptic number.

67748406784 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

67748406784 is a deficient number, since it is larger than the sum of its proper divisors (67616086700).

67748406784 is an equidigital number, since it uses as much as digits as its factorization.

67748406784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132321125 (or 132321109 counting only the distinct ones).

The product of its (nonzero) digits is 50577408, while the sum is 61.

The spelling of 67748406784 in words is "sixty-seven billion, seven hundred forty-eight million, four hundred six thousand, seven hundred eighty-four".