66983735 has 24 divisors (see below), whose sum is σ = 100701216. Its totient is φ = 42396480.

The previous prime is 66983731. The next prime is 66983753. The reversal of 66983735 is 53738966.

It is not a de Polignac number, because 66983735 - 2² = 66983731 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66983735.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66983731) 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, 7331 + ... + 13700.

It is an arithmetic number, because the mean of its divisors is an integer number (4195884).

Almost surely, 2^66983735 is an apocalyptic number.

66983735 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

66983735 is a deficient number, since it is larger than the sum of its proper divisors (33717481).

66983735 is a wasteful number, since it uses less digits than its factorization.

66983735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21063 (or 21056 counting only the distinct ones).

The product of its digits is 816480, while the sum is 47.

The square root of 66983735 is about 8184.3591685605. The cubic root of 66983735 is about 406.1219411758.

The spelling of 66983735 in words is "sixty-six million, nine hundred eighty-three thousand, seven hundred thirty-five".