5661766057 has 16 divisors (see below), whose sum is σ = 5857339392. Its totient is φ = 5469995520.

The previous prime is 5661766051. The next prime is 5661766063. The reversal of 5661766057 is 7506671665.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (5661766051) and next prime (5661766063).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5661766057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5661766057.

It is not an unprimeable number, because it can be changed into a prime (5661766051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1563513 + ... + 1567129.

It is an arithmetic number, because the mean of its divisors is an integer number (366083712).

Almost surely, 2^5661766057 is an apocalyptic number.

It is an amenable number.

5661766057 is a deficient number, since it is larger than the sum of its proper divisors (195573335).

5661766057 is a wasteful number, since it uses less digits than its factorization.

5661766057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4128.

The product of its (nonzero) digits is 1587600, while the sum is 49.

The square root of 5661766057 is about 75244.7078338404. The cubic root of 5661766057 is about 1782.3129945635.

The spelling of 5661766057 in words is "five billion, six hundred sixty-one million, seven hundred sixty-six thousand, fifty-seven".