66963743 has 24 divisors (see below), whose sum is σ = 85472640. Its totient is φ = 51876720.

The previous prime is 66963739. The next prime is 66963763. The reversal of 66963743 is 34736966.

It is not a de Polignac number, because 66963743 - 2² = 66963739 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66963694 and 66963703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66963763) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 152318 + ... + 152756.

It is an arithmetic number, because the mean of its divisors is an integer number (3561360).

Almost surely, 2^66963743 is an apocalyptic number.

66963743 is a deficient number, since it is larger than the sum of its proper divisors (18508897).

66963743 is a wasteful number, since it uses less digits than its factorization.

66963743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747 (or 740 counting only the distinct ones).

The product of its digits is 489888, while the sum is 44.

The square root of 66963743 is about 8183.1377233919. The cubic root of 66963743 is about 406.0815333677.

The spelling of 66963743 in words is "sixty-six million, nine hundred sixty-three thousand, seven hundred forty-three".