66802939004 has 24 divisors (see below), whose sum is σ = 117445306608. Its totient is φ = 33247393920.

The previous prime is 66802939001. The next prime is 66802939061. The reversal of 66802939004 is 40093920866.

It is a self number, because there is not a number n which added to its sum of digits gives 66802939004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66802939001) 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, 1029194 + ... + 1092174.

It is an arithmetic number, because the mean of its divisors is an integer number (4893554442).

Almost surely, 2^66802939004 is an apocalyptic number.

It is an amenable number.

66802939004 is a deficient number, since it is larger than the sum of its proper divisors (50642367604).

66802939004 is a wasteful number, since it uses less digits than its factorization.

66802939004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64205 (or 64203 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 47.

The spelling of 66802939004 in words is "sixty-six billion, eight hundred two million, nine hundred thirty-nine thousand, four".