66733400667 has 8 divisors (see below), whose sum is σ = 88979113024. Its totient is φ = 44488311048.

The previous prime is 66733400653. The next prime is 66733400677. The reversal of 66733400667 is 76600433766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66733400667 - 2⁶ = 66733400603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66733400677) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232968 + ... + 433290.

It is an arithmetic number, because the mean of its divisors is an integer number (11122389128).

Almost surely, 2^66733400667 is an apocalyptic number.

66733400667 is a deficient number, since it is larger than the sum of its proper divisors (22245712357).

66733400667 is a wasteful number, since it uses less digits than its factorization.

66733400667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311369.

The product of its (nonzero) digits is 2286144, while the sum is 48.

The spelling of 66733400667 in words is "sixty-six billion, seven hundred thirty-three million, four hundred thousand, six hundred sixty-seven".