66733406699 has 8 divisors (see below), whose sum is σ = 68828056128. Its totient is φ = 64666873600.

The previous prime is 66733406683. The next prime is 66733406711. The reversal of 66733406699 is 99660433766.

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

It is a cyclic number.

It is not a de Polignac number, because 66733406699 - 2⁴ = 66733406683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66733406599) 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, 7024262 + ... + 7033755.

It is an arithmetic number, because the mean of its divisors is an integer number (8603507016).

Almost surely, 2^66733406699 is an apocalyptic number.

66733406699 is a deficient number, since it is larger than the sum of its proper divisors (2094649429).

66733406699 is a wasteful number, since it uses less digits than its factorization.

66733406699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14058165.

The product of its (nonzero) digits is 26453952, while the sum is 59.

The spelling of 66733406699 in words is "sixty-six billion, seven hundred thirty-three million, four hundred six thousand, six hundred ninety-nine".