66703777777672 has 16 divisors (see below), whose sum is σ = 142936666666560. Its totient is φ = 28587333333264.

The previous prime is 66703777777657. The next prime is 66703777777697. The reversal of 66703777777672 is 27677777730766.

66703777777672 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 66703777777592 and 66703777777601.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 595569444388 + ... + 595569444499.

It is an arithmetic number, because the mean of its divisors is an integer number (8933541666660).

Almost surely, 2^{66703777777672} is an apocalyptic number.

It is an amenable number.

66703777777672 is an abundant number, since it is smaller than the sum of its proper divisors (76232888888888).

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

66703777777672 is a wasteful number, since it uses less digits than its factorization.

66703777777672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1191138888900 (or 1191138888896 counting only the distinct ones).

The product of its (nonzero) digits is 7471182096, while the sum is 79.

The spelling of 66703777777672 in words is "sixty-six trillion, seven hundred three billion, seven hundred seventy-seven million, seven hundred seventy-seven thousand, six hundred seventy-two".