2661177061 has 8 divisors (see below), whose sum is σ = 2684259864. Its totient is φ = 2638191360.

The previous prime is 2661177053. The next prime is 2661177067. The reversal of 2661177061 is 1607711662.

It can be written as a sum of positive squares in 4 ways, for example, as 1778730625 + 882446436 = 42175^2 + 29706^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2661177061 - 2³ = 2661177053 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 2661177061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661177067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31321 + ... + 79393.

It is an arithmetic number, because the mean of its divisors is an integer number (335532483).

Almost surely, 2^2661177061 is an apocalyptic number.

It is an amenable number.

2661177061 is a deficient number, since it is larger than the sum of its proper divisors (23082803).

2661177061 is a wasteful number, since it uses less digits than its factorization.

2661177061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48551.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 2661177061 is about 51586.5976877716. The cubic root of 2661177061 is about 1385.7703249903.

The spelling of 2661177061 in words is "two billion, six hundred sixty-one million, one hundred seventy-seven thousand, sixty-one".