6691894676 has 6 divisors (see below), whose sum is σ = 11710815690. Its totient is φ = 3345947336.

The previous prime is 6691894673. The next prime is 6691894679. The reversal of 6691894676 is 6764981966.

It is an interprime number because it is at equal distance from previous prime (6691894673) and next prime (6691894679).

It can be written as a sum of positive squares in only one way, i.e., 3388404100 + 3303490576 = 58210^2 + 57476^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6691894673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 836486831 + ... + 836486838.

It is an arithmetic number, because the mean of its divisors is an integer number (1951802615).

Almost surely, 2^6691894676 is an apocalyptic number.

It is an amenable number.

6691894676 is a deficient number, since it is larger than the sum of its proper divisors (5018921014).

6691894676 is a wasteful number, since it uses less digits than its factorization.

6691894676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1672973673 (or 1672973671 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 62.

The square root of 6691894676 is about 81804.0015891643. The cubic root of 6691894676 is about 1884.4431159904.

The spelling of 6691894676 in words is "six billion, six hundred ninety-one million, eight hundred ninety-four thousand, six hundred seventy-six".