66639073902 has 8 divisors (see below), whose sum is σ = 133278147816. Its totient is φ = 22213024632.

The previous prime is 66639073873. The next prime is 66639073909. The reversal of 66639073902 is 20937093666.

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

66639073902 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66639073909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5553256153 + ... + 5553256164.

It is an arithmetic number, because the mean of its divisors is an integer number (16659768477).

Almost surely, 2^66639073902 is an apocalyptic number.

66639073902 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66639073902 is a wasteful number, since it uses less digits than its factorization.

66639073902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11106512322.

The product of its (nonzero) digits is 2204496, while the sum is 51.

The spelling of 66639073902 in words is "sixty-six billion, six hundred thirty-nine million, seventy-three thousand, nine hundred two".