66673810780 has 48 divisors (see below), whose sum is σ = 140796865440. Its totient is φ = 26520738048.

The previous prime is 66673810769. The next prime is 66673810781. The reversal of 66673810780 is 8701837666.

66673810780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66673810781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12246739 + ... + 12252181.

It is an arithmetic number, because the mean of its divisors is an integer number (2933268030).

Almost surely, 2^66673810780 is an apocalyptic number.

It is an amenable number.

66673810780 is an abundant number, since it is smaller than the sum of its proper divisors (74123054660).

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

66673810780 is a wasteful number, since it uses less digits than its factorization.

66673810780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8758 (or 8756 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 52.

The spelling of 66673810780 in words is "sixty-six billion, six hundred seventy-three million, eight hundred ten thousand, seven hundred eighty".