66693033477 has 32 divisors (see below), whose sum is σ = 113425858560. Its totient is φ = 37939382640.

The previous prime is 66693033469. The next prime is 66693033551. The reversal of 66693033477 is 77433039666.

It is not a de Polignac number, because 66693033477 - 2³ = 66693033469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66693033457) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 749049 + ... + 833342.

It is an arithmetic number, because the mean of its divisors is an integer number (3544558080).

Almost surely, 2^66693033477 is an apocalyptic number.

It is an amenable number.

66693033477 is a deficient number, since it is larger than the sum of its proper divisors (46732825083).

66693033477 is a wasteful number, since it uses less digits than its factorization.

66693033477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1582630 (or 1582624 counting only the distinct ones).

The product of its (nonzero) digits is 10287648, while the sum is 54.

The spelling of 66693033477 in words is "sixty-six billion, six hundred ninety-three million, thirty-three thousand, four hundred seventy-seven".