66666364 has 24 divisors (see below), whose sum is σ = 123791360. Its totient is φ = 31325616.

The previous prime is 66666361. The next prime is 66666371. The reversal of 66666364 is 46366666.

It is a self number, because there is not a number n which added to its sum of digits gives 66666364.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66666361) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 6199 + ... + 13105.

Almost surely, 2^66666364 is an apocalyptic number.

It is an amenable number.

66666364 is a deficient number, since it is larger than the sum of its proper divisors (57124996).

66666364 is a wasteful number, since it uses less digits than its factorization.

66666364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7057 (or 7055 counting only the distinct ones).

The product of its digits is 559872, while the sum is 43.

The square root of 66666364 is about 8164.9472747838. The cubic root of 66666364 is about 405.4795194107.

It can be divided in two parts, 6666 and 6364, that multiplied together give a palindrome (42422424).

The spelling of 66666364 in words is "sixty-six million, six hundred sixty-six thousand, three hundred sixty-four".