6780699025 has 27 divisors (see below), whose sum is σ = 8630684859. Its totient is φ = 5284572720.

The previous prime is 6780699017. The next prime is 6780699041. The reversal of 6780699025 is 5209960876.

It is a happy number.

The square root of 6780699025 is 82345.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 2441051649 + 4339647376 = 49407^2 + 65876^2 .

It is not a de Polignac number, because 6780699025 - 2³ = 6780699017 is a prime.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 17703984 + ... + 17704366.

Almost surely, 2^6780699025 is an apocalyptic number.

6780699025 is the 82345-th square number.

6780699025 is the 41173-rd centered octagonal number.

It is an amenable number.

6780699025 is a deficient number, since it is larger than the sum of its proper divisors (1849985834).

6780699025 is an frugal number, since it uses more digits than its factorization.

6780699025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862 (or 431 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 52.

The cubic root of 6780699025 is about 1892.7423051455.

The spelling of 6780699025 in words is "six billion, seven hundred eighty million, six hundred ninety-nine thousand, twenty-five".