66723659232049 has 16 divisors (see below), whose sum is σ = 73799612593920. Its totient is φ = 60003698698240.

The previous prime is 66723659232047. The next prime is 66723659232107. The reversal of 66723659232049 is 94023295632766.

It is a cyclic number.

It is not a de Polignac number, because 66723659232049 - 2¹ = 66723659232047 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66723659232047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91482157 + ... + 92208634.

It is an arithmetic number, because the mean of its divisors is an integer number (4612475787120).

Almost surely, 2^{66723659232049} is an apocalyptic number.

It is an amenable number.

66723659232049 is a deficient number, since it is larger than the sum of its proper divisors (7075953361871).

66723659232049 is a wasteful number, since it uses less digits than its factorization.

66723659232049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183691760.

The product of its (nonzero) digits is 176359680, while the sum is 64.

The spelling of 66723659232049 in words is "sixty-six trillion, seven hundred twenty-three billion, six hundred fifty-nine million, two hundred thirty-two thousand, forty-nine".