7166354561 has 4 divisors (see below), whose sum is σ = 7301568852. Its totient is φ = 7031140272.

The previous prime is 7166354527. The next prime is 7166354581. The reversal of 7166354561 is 1654536617.

7166354561 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1654536617 = 27241 ⋅60737.

It can be written as a sum of positive squares in 2 ways, for example, as 3324214336 + 3842140225 = 57656^2 + 61985^2 .

It is not a de Polignac number, because 7166354561 - 2⁶ = 7166354497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7166354581) 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, 67607066 + ... + 67607171.

It is an arithmetic number, because the mean of its divisors is an integer number (1825392213).

Almost surely, 2^7166354561 is an apocalyptic number.

It is an amenable number.

7166354561 is a deficient number, since it is larger than the sum of its proper divisors (135214291).

7166354561 is a wasteful number, since it uses less digits than its factorization.

7166354561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135214290.

The product of its digits is 453600, while the sum is 44.

The square root of 7166354561 is about 84654.3239356384. The cubic root of 7166354561 is about 1927.9662650022.

The spelling of 7166354561 in words is "seven billion, one hundred sixty-six million, three hundred fifty-four thousand, five hundred sixty-one".