6977408257 has 4 divisors (see below), whose sum is σ = 6987964756. Its totient is φ = 6966851760.

The previous prime is 6977408177. The next prime is 6977408327. The reversal of 6977408257 is 7528047796.

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 6450659856 + 526748401 = 80316^2 + 22951^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6977408257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6977408198 and 6977408207.

It is not an unprimeable number, because it can be changed into a prime (6977408357) 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 3 ways as a sum of consecutive naturals, for example, 5277258 + ... + 5278579.

It is an arithmetic number, because the mean of its divisors is an integer number (1746991189).

Almost surely, 2^6977408257 is an apocalyptic number.

It is an amenable number.

6977408257 is a deficient number, since it is larger than the sum of its proper divisors (10556499).

6977408257 is a wasteful number, since it uses less digits than its factorization.

6977408257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10556498.

The product of its (nonzero) digits is 5927040, while the sum is 55.

The square root of 6977408257 is about 83530.8820556805. The cubic root of 6977408257 is about 1910.8710387087.

The spelling of 6977408257 in words is "six billion, nine hundred seventy-seven million, four hundred eight thousand, two hundred fifty-seven".