6980878257 has 8 divisors (see below), whose sum is σ = 9378890400. Its totient is φ = 4618392480.

The previous prime is 6980878211. The next prime is 6980878273. The reversal of 6980878257 is 7528780896.

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

It is not a de Polignac number, because 6980878257 - 2⁶ = 6980878193 is a prime.

It is a super-2 number, since 2×6980878257² = 97465322478110716098, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6980878257.

It is not an unprimeable number, because it can be changed into a prime (6980878207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8881132 + ... + 8881917.

It is an arithmetic number, because the mean of its divisors is an integer number (1172361300).

Almost surely, 2^6980878257 is an apocalyptic number.

It is an amenable number.

6980878257 is a deficient number, since it is larger than the sum of its proper divisors (2398012143).

6980878257 is a wasteful number, since it uses less digits than its factorization.

6980878257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17763183.

The product of its (nonzero) digits is 13547520, while the sum is 60.

The square root of 6980878257 is about 83551.6502350492. The cubic root of 6980878257 is about 1911.1877572460.

The spelling of 6980878257 in words is "six billion, nine hundred eighty million, eight hundred seventy-eight thousand, two hundred fifty-seven".