6666793 has 6 divisors (see below), whose sum is σ = 7755306. Its totient is φ = 5714352.

The previous prime is 6666791. The next prime is 6666797. The reversal of 6666793 is 3976666.

It can be written as a sum of positive squares in only one way, i.e., 4380649 + 2286144 = 2093^2 + 1512^2 .

It is not a de Polignac number, because 6666793 - 2¹ = 6666791 is a prime.

It is a super-2 number, since 2×6666793² = 88892257809698, which contains 22 as substring.

It is a Duffinian number.

6666793 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6666791) 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, 67980 + ... + 68077.

It is an arithmetic number, because the mean of its divisors is an integer number (1292551).

Almost surely, 2^6666793 is an apocalyptic number.

It is an amenable number.

6666793 is a deficient number, since it is larger than the sum of its proper divisors (1088513).

6666793 is a wasteful number, since it uses less digits than its factorization.

6666793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136071 (or 136064 counting only the distinct ones).

The product of its digits is 244944, while the sum is 43.

The square root of 6666793 is about 2582.0133617005. The cubic root of 6666793 is about 188.2083946109.

The spelling of 6666793 in words is "six million, six hundred sixty-six thousand, seven hundred ninety-three".