6690846686 has 4 divisors (see below), whose sum is σ = 10036270032. Its totient is φ = 3345423342.

The previous prime is 6690846683. The next prime is 6690846739. The reversal of 6690846686 is 6866480966.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6690846683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1672711670 + ... + 1672711673.

It is an arithmetic number, because the mean of its divisors is an integer number (2509067508).

Almost surely, 2^6690846686 is an apocalyptic number.

6690846686 is a deficient number, since it is larger than the sum of its proper divisors (3345423346).

6690846686 is a wasteful number, since it uses less digits than its factorization.

6690846686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3345423345.

The product of its (nonzero) digits is 17915904, while the sum is 59.

The square root of 6690846686 is about 81797.5958448658. The cubic root of 6690846686 is about 1884.3447392357.

The spelling of 6690846686 in words is "six billion, six hundred ninety million, eight hundred forty-six thousand, six hundred eighty-six".