6870655261 has 4 divisors (see below), whose sum is σ = 6872093532. Its totient is φ = 6869216992.

The previous prime is 6870655223. The next prime is 6870655301. The reversal of 6870655261 is 1625560786.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1625560786 = 2 ⋅812780393.

It can be written as a sum of positive squares in 2 ways, for example, as 5524205625 + 1346449636 = 74325^2 + 36694^2 .

It is a cyclic number.

It is not a de Polignac number, because 6870655261 - 2⁷ = 6870655133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6870655061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 711946 + ... + 721531.

It is an arithmetic number, because the mean of its divisors is an integer number (1718023383).

Almost surely, 2^6870655261 is an apocalyptic number.

It is an amenable number.

6870655261 is a deficient number, since it is larger than the sum of its proper divisors (1438271).

6870655261 is a wasteful number, since it uses less digits than its factorization.

6870655261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1438270.

The product of its (nonzero) digits is 604800, while the sum is 46.

The square root of 6870655261 is about 82889.4158563082. The cubic root of 6870655261 is about 1901.0755923760.

The spelling of 6870655261 in words is "six billion, eight hundred seventy million, six hundred fifty-five thousand, two hundred sixty-one".