66930033780 has 96 divisors (see below), whose sum is σ = 209866567680. Its totient is φ = 17707455360.

The previous prime is 66930033697. The next prime is 66930033799. The reversal of 66930033780 is 8733003966.

It is a happy number.

66930033780 is a `hidden beast` number, since 6 + 6 + 9 + 300 + 337 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 419391 + ... + 556550.

It is an arithmetic number, because the mean of its divisors is an integer number (2186110080).

Almost surely, 2^66930033780 is an apocalyptic number.

66930033780 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66930033780 is an abundant number, since it is smaller than the sum of its proper divisors (142936533900).

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

66930033780 is a wasteful number, since it uses less digits than its factorization.

66930033780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976086 (or 976078 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 45.

The spelling of 66930033780 in words is "sixty-six billion, nine hundred thirty million, thirty-three thousand, seven hundred eighty".