66910943 has 6 divisors (see below), whose sum is σ = 73546872. Its totient is φ = 60828020.

The previous prime is 66910931. The next prime is 66910973. The reversal of 66910943 is 34901966.

It is not a de Polignac number, because 66910943 - 2⁸ = 66910687 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66910897 and 66910906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66910903) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 276371 + ... + 276612.

It is an arithmetic number, because the mean of its divisors is an integer number (12257812).

Almost surely, 2^66910943 is an apocalyptic number.

66910943 is a deficient number, since it is larger than the sum of its proper divisors (6635929).

66910943 is a wasteful number, since it uses less digits than its factorization.

66910943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553005 (or 552994 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 66910943 is about 8179.9109408355. The cubic root of 66910943 is about 405.9747753829.

The spelling of 66910943 in words is "sixty-six million, nine hundred ten thousand, nine hundred forty-three".