7166856261 has 4 divisors (see below), whose sum is σ = 9555808352. Its totient is φ = 4777904172.

The previous prime is 7166856251. The next prime is 7166856317. The reversal of 7166856261 is 1626586617.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 7166856261 - 2⁶ = 7166856197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7166856261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7166856251) 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, 1194476041 + ... + 1194476046.

It is an arithmetic number, because the mean of its divisors is an integer number (2388952088).

Almost surely, 2^7166856261 is an apocalyptic number.

It is an amenable number.

7166856261 is a deficient number, since it is larger than the sum of its proper divisors (2388952091).

7166856261 is a wasteful number, since it uses less digits than its factorization.

7166856261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2388952090.

The product of its digits is 725760, while the sum is 48.

The square root of 7166856261 is about 84657.2871110337. The cubic root of 7166856261 is about 1928.0112547803.

The spelling of 7166856261 in words is "seven billion, one hundred sixty-six million, eight hundred fifty-six thousand, two hundred sixty-one".