6991077 has 8 divisors (see below), whose sum is σ = 9393120. Its totient is φ = 4624880.

The previous prime is 6991043. The next prime is 6991091. The reversal of 6991077 is 7701996.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6991077 - 2⁶ = 6991013 is a prime.

6991077 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6991277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8502 + ... + 9287.

It is an arithmetic number, because the mean of its divisors is an integer number (1174140).

Almost surely, 2^6991077 is an apocalyptic number.

It is an amenable number.

6991077 is a deficient number, since it is larger than the sum of its proper divisors (2402043).

6991077 is a wasteful number, since it uses less digits than its factorization.

6991077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17923.

The product of its (nonzero) digits is 23814, while the sum is 39.

The square root of 6991077 is about 2644.0644848415. The cubic root of 6991077 is about 191.2118023590.

The spelling of 6991077 in words is "six million, nine hundred ninety-one thousand, seventy-seven".