66943252436 has 12 divisors (see below), whose sum is σ = 120929746560. Its totient is φ = 32391896280.

The previous prime is 66943252421. The next prime is 66943252459. The reversal of 66943252436 is 63425234966.

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, 269932346 + ... + 269932593.

It is an arithmetic number, because the mean of its divisors is an integer number (10077478880).

Almost surely, 2^66943252436 is an apocalyptic number.

It is an amenable number.

66943252436 is a deficient number, since it is larger than the sum of its proper divisors (53986494124).

66943252436 is a wasteful number, since it uses less digits than its factorization.

66943252436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539864974 (or 539864972 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 50.

The spelling of 66943252436 in words is "sixty-six billion, nine hundred forty-three million, two hundred fifty-two thousand, four hundred thirty-six".