666683043061 has 12 divisors (see below), whose sum is σ = 775620309792. Its totient is φ = 571375514808.

The previous prime is 666683043029. The next prime is 666683043067. The reversal of 666683043061 is 160340386666.

It is not a de Polignac number, because 666683043061 - 2⁵ = 666683043029 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 666683042996 and 666683043014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666683043067) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 374865 + ... + 1214038.

It is an arithmetic number, because the mean of its divisors is an integer number (64635025816).

Almost surely, 2^666683043061 is an apocalyptic number.

It is an amenable number.

666683043061 is a deficient number, since it is larger than the sum of its proper divisors (108937266731).

666683043061 is a wasteful number, since it uses less digits than its factorization.

666683043061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1597480 (or 1597473 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 49.

The spelling of 666683043061 in words is "six hundred sixty-six billion, six hundred eighty-three million, forty-three thousand, sixty-one".