5611666728 has 16 divisors (see below), whose sum is σ = 14029166880. Its totient is φ = 1870555568.

The previous prime is 5611666693. The next prime is 5611666733. The reversal of 5611666728 is 8276661165.

It is a super-2 number, since 2×5611666728² = 62981606932284451968, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116909700 + ... + 116909747.

It is an arithmetic number, because the mean of its divisors is an integer number (876822930).

Almost surely, 2^5611666728 is an apocalyptic number.

It is an amenable number.

5611666728 is an abundant number, since it is smaller than the sum of its proper divisors (8417500152).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5611666728 is a wasteful number, since it uses less digits than its factorization.

5611666728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233819456 (or 233819452 counting only the distinct ones).

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

The square root of 5611666728 is about 74911.0587830662. The cubic root of 5611666728 is about 1777.0403545627.

The spelling of 5611666728 in words is "five billion, six hundred eleven million, six hundred sixty-six thousand, seven hundred twenty-eight".