2661466757 has 4 divisors (see below), whose sum is σ = 2679329100. Its totient is φ = 2643604416.

The previous prime is 2661466741. The next prime is 2661466763. The reversal of 2661466757 is 7576641662.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7576641662 = 2 ⋅3788320831.

It can be written as a sum of positive squares in 2 ways, for example, as 744252961 + 1917213796 = 27281^2 + 43786^2 .

It is a cyclic number.

It is not a de Polignac number, because 2661466757 - 2⁴ = 2661466741 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 (2661466727) 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, 8930948 + ... + 8931245.

It is an arithmetic number, because the mean of its divisors is an integer number (669832275).

Almost surely, 2^2661466757 is an apocalyptic number.

It is an amenable number.

2661466757 is a deficient number, since it is larger than the sum of its proper divisors (17862343).

2661466757 is a wasteful number, since it uses less digits than its factorization.

2661466757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17862342.

The product of its digits is 2540160, while the sum is 50.

The square root of 2661466757 is about 51589.4054724417. The cubic root of 2661466757 is about 1385.8206081976.

The spelling of 2661466757 in words is "two billion, six hundred sixty-one million, four hundred sixty-six thousand, seven hundred fifty-seven".