66666771004 has 6 divisors (see below), whose sum is σ = 116666849264. Its totient is φ = 33333385500.

The previous prime is 66666771001. The next prime is 66666771023. The reversal of 66666771004 is 40017766666.

66666771004 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 (66666771001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8333346372 + ... + 8333346379.

Almost surely, 2^66666771004 is an apocalyptic number.

It is an amenable number.

66666771004 is a deficient number, since it is larger than the sum of its proper divisors (50000078260).

66666771004 is a wasteful number, since it uses less digits than its factorization.

66666771004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16666692755 (or 16666692753 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 49.

The spelling of 66666771004 in words is "sixty-six billion, six hundred sixty-six million, seven hundred seventy-one thousand, four".