7006881257 has 4 divisors (see below), whose sum is σ = 7012492500. Its totient is φ = 7001270016.

The previous prime is 7006881229. The next prime is 7006881283. The reversal of 7006881257 is 7521886007.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7521886007 = 85619 ⋅87853.

It can be written as a sum of positive squares in 2 ways, for example, as 3182200921 + 3824680336 = 56411^2 + 61844^2 .

It is a cyclic number.

It is not a de Polignac number, because 7006881257 - 2⁸ = 7006881001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7006887257) 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, 2803748 + ... + 2806245.

It is an arithmetic number, because the mean of its divisors is an integer number (1753123125).

Almost surely, 2^7006881257 is an apocalyptic number.

It is an amenable number.

7006881257 is a deficient number, since it is larger than the sum of its proper divisors (5611243).

7006881257 is a wasteful number, since it uses less digits than its factorization.

7006881257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5611242.

The product of its (nonzero) digits is 188160, while the sum is 44.

The square root of 7006881257 is about 83707.1159280978. The cubic root of 7006881257 is about 1913.5578046813.

The spelling of 7006881257 in words is "seven billion, six million, eight hundred eighty-one thousand, two hundred fifty-seven".