666729990073 has 4 divisors (see below), whose sum is σ = 761977131520. Its totient is φ = 571482848628.

The previous prime is 666729990029. The next prime is 666729990083. The reversal of 666729990073 is 370099927666.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 666729990073 - 2³³ = 658140055481 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 666729989987 and 666729990014.

It is not an unprimeable number, because it can be changed into a prime (666729990013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47623570713 + ... + 47623570726.

It is an arithmetic number, because the mean of its divisors is an integer number (190494282880).

Almost surely, 2^666729990073 is an apocalyptic number.

It is an amenable number.

666729990073 is a deficient number, since it is larger than the sum of its proper divisors (95247141447).

666729990073 is an equidigital number, since it uses as much as digits as its factorization.

666729990073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95247141446.

The product of its (nonzero) digits is 46294416, while the sum is 64.

The spelling of 666729990073 in words is "six hundred sixty-six billion, seven hundred twenty-nine million, nine hundred ninety thousand, seventy-three".