6691066804 has 24 divisors (see below), whose sum is σ = 12229596288. Its totient is φ = 3197161440.

The previous prime is 6691066801. The next prime is 6691066807. The reversal of 6691066804 is 4086601966.

It is an interprime number because it is at equal distance from previous prime (6691066801) and next prime (6691066807).

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6691066801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70209 + ... + 135319.

It is an arithmetic number, because the mean of its divisors is an integer number (509566512).

Almost surely, 2^6691066804 is an apocalyptic number.

It is an amenable number.

6691066804 is a deficient number, since it is larger than the sum of its proper divisors (5538529484).

6691066804 is a wasteful number, since it uses less digits than its factorization.

6691066804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66255 (or 66253 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 46.

The square root of 6691066804 is about 81798.9413378926. The cubic root of 6691066804 is about 1884.3654029707.

The spelling of 6691066804 in words is "six billion, six hundred ninety-one million, sixty-six thousand, eight hundred four".