66983817467 has 6 divisors (see below), whose sum is σ = 77919950988. Its totient is φ = 57414700644.

The previous prime is 66983817421. The next prime is 66983817491. The reversal of 66983817467 is 76471838966.

It is not a de Polignac number, because 66983817467 - 2¹² = 66983813371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66983817497) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 683508293 + ... + 683508390.

It is an arithmetic number, because the mean of its divisors is an integer number (12986658498).

Almost surely, 2^66983817467 is an apocalyptic number.

66983817467 is a deficient number, since it is larger than the sum of its proper divisors (10936133521).

66983817467 is a wasteful number, since it uses less digits than its factorization.

66983817467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1367016697 (or 1367016690 counting only the distinct ones).

The product of its digits is 73156608, while the sum is 65.

The spelling of 66983817467 in words is "sixty-six billion, nine hundred eighty-three million, eight hundred seventeen thousand, four hundred sixty-seven".