6700991 has 16 divisors (see below), whose sum is σ = 7738368. Its totient is φ = 5745600.

The previous prime is 6700987. The next prime is 6700997. The reversal of 6700991 is 1990076.

It is a cyclic number.

It is not a de Polignac number, because 6700991 - 2² = 6700987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6700997) 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 15 ways as a sum of consecutive naturals, for example, 14435 + ... + 14891.

It is an arithmetic number, because the mean of its divisors is an integer number (483648).

Almost surely, 2^6700991 is an apocalyptic number.

6700991 is a deficient number, since it is larger than the sum of its proper divisors (1037377).

6700991 is a wasteful number, since it uses less digits than its factorization.

6700991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 6700991 is about 2588.6272423816. The cubic root of 6700991 is about 188.5296573543.

Subtracting from 6700991 its reverse (1990076), we obtain a triangular number (4710915 = T₃₀₆₉).

The spelling of 6700991 in words is "six million, seven hundred thousand, nine hundred ninety-one".