66690239804 has 12 divisors (see below), whose sum is σ = 117863444328. Its totient is φ = 33014970000.

The previous prime is 66690239717. The next prime is 66690239809. The reversal of 66690239804 is 40893209666.

66690239804 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66690239809) 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, 82537022 + ... + 82537829.

It is an arithmetic number, because the mean of its divisors is an integer number (9821953694).

Almost surely, 2^66690239804 is an apocalyptic number.

It is an amenable number.

66690239804 is a deficient number, since it is larger than the sum of its proper divisors (51173204524).

66690239804 is a wasteful number, since it uses less digits than its factorization.

66690239804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165074956 (or 165074954 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 53.

The spelling of 66690239804 in words is "sixty-six billion, six hundred ninety million, two hundred thirty-nine thousand, eight hundred four".