66883647476 has 24 divisors (see below), whose sum is σ = 120317141280. Its totient is φ = 32508935712.

The previous prime is 66883647443. The next prime is 66883647511. The reversal of 66883647476 is 67474638866.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35006 + ... + 367413.

It is an arithmetic number, because the mean of its divisors is an integer number (5013214220).

Almost surely, 2^66883647476 is an apocalyptic number.

It is an amenable number.

66883647476 is a deficient number, since it is larger than the sum of its proper divisors (53433493804).

66883647476 is a wasteful number, since it uses less digits than its factorization.

66883647476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403583 (or 403581 counting only the distinct ones).

The product of its digits is 195084288, while the sum is 65.

The spelling of 66883647476 in words is "sixty-six billion, eight hundred eighty-three million, six hundred forty-seven thousand, four hundred seventy-six".