66736707073989 has 8 divisors (see below), whose sum is σ = 88982382146112. Its totient is φ = 44491085025600.

The previous prime is 66736707073963. The next prime is 66736707074047. The reversal of 66736707073989 is 98937070763766.

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

It is not a de Polignac number, because 66736707073989 - 2¹⁹ = 66736706549701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66736707073909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10219812 + ... + 15424589.

It is an arithmetic number, because the mean of its divisors is an integer number (11122797768264).

Almost surely, 2^{66736707073989} is an apocalyptic number.

It is an amenable number.

66736707073989 is a deficient number, since it is larger than the sum of its proper divisors (22245675072123).

66736707073989 is a wasteful number, since it uses less digits than its factorization.

66736707073989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26511867.

The product of its (nonzero) digits is 3024568512, while the sum is 78.

The spelling of 66736707073989 in words is "sixty-six trillion, seven hundred thirty-six billion, seven hundred seven million, seventy-three thousand, nine hundred eighty-nine".