6977557 has 4 divisors (see below), whose sum is σ = 6997900. Its totient is φ = 6957216.

The previous prime is 6977527. The next prime is 6977569. The reversal of 6977557 is 7557796.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4639716 + 2337841 = 2154^2 + 1529^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6977557 is a prime.

It is a Duffinian number.

6977557 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6977527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9648 + ... + 10345.

It is an arithmetic number, because the mean of its divisors is an integer number (1749475).

Almost surely, 2^6977557 is an apocalyptic number.

It is an amenable number.

6977557 is a deficient number, since it is larger than the sum of its proper divisors (20343).

6977557 is a wasteful number, since it uses less digits than its factorization.

6977557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20342.

The product of its digits is 463050, while the sum is 46.

The square root of 6977557 is about 2641.5065776939. The cubic root of 6977557 is about 191.0884617135.

The spelling of 6977557 in words is "six million, nine hundred seventy-seven thousand, five hundred fifty-seven".