67780623920 has 40 divisors (see below), whose sum is σ = 157601433696. Its totient is φ = 27110274048.

The previous prime is 67780623919. The next prime is 67780624063. The reversal of 67780623920 is 2932608776.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1626869 + ... + 1668011.

Almost surely, 2^67780623920 is an apocalyptic number.

It is an amenable number.

67780623920 is an abundant number, since it is smaller than the sum of its proper divisors (89820809776).

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

67780623920 is a wasteful number, since it uses less digits than its factorization.

67780623920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61749 (or 61743 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 50.

The spelling of 67780623920 in words is "sixty-seven billion, seven hundred eighty million, six hundred twenty-three thousand, nine hundred twenty".