66231408028 has 12 divisors (see below), whose sum is σ = 120944310480. Its totient is φ = 31675890752.

The previous prime is 66231407951. The next prime is 66231408079. The reversal of 66231408028 is 82080413266.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359953213 + ... + 359953396.

It is an arithmetic number, because the mean of its divisors is an integer number (10078692540).

Almost surely, 2^66231408028 is an apocalyptic number.

It is an amenable number.

66231408028 is a deficient number, since it is larger than the sum of its proper divisors (54712902452).

66231408028 is a wasteful number, since it uses less digits than its factorization.

66231408028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719906636 (or 719906634 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 40.

The spelling of 66231408028 in words is "sixty-six billion, two hundred thirty-one million, four hundred eight thousand, twenty-eight".