66783343 has 16 divisors (see below), whose sum is σ = 74967552. Its totient is φ = 58968000.

The previous prime is 66783337. The next prime is 66783359. The reversal of 66783343 is 34338766.

It is a cyclic number.

It is not a de Polignac number, because 66783343 - 2²⁵ = 33228911 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66783296 and 66783305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66783323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127923 + ... + 128443.

It is an arithmetic number, because the mean of its divisors is an integer number (4685472).

Almost surely, 2^66783343 is an apocalyptic number.

66783343 is a deficient number, since it is larger than the sum of its proper divisors (8184209).

66783343 is a wasteful number, since it uses less digits than its factorization.

66783343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846.

The product of its digits is 217728, while the sum is 40.

The square root of 66783343 is about 8172.1076228841. The cubic root of 66783343 is about 405.7165448493.

The spelling of 66783343 in words is "sixty-six million, seven hundred eighty-three thousand, three hundred forty-three".