3111666520 has 16 divisors (see below), whose sum is σ = 7001249760. Its totient is φ = 1244666592.

The previous prime is 3111666473. The next prime is 3111666529. The reversal of 3111666520 is 256661113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3111666529) 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, 38895792 + ... + 38895871.

It is an arithmetic number, because the mean of its divisors is an integer number (437578110).

Almost surely, 2^3111666520 is an apocalyptic number.

It is an amenable number.

3111666520 is an abundant number, since it is smaller than the sum of its proper divisors (3889583240).

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

3111666520 is a wasteful number, since it uses less digits than its factorization.

3111666520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77791674 (or 77791670 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 3111666520 is about 55782.3136845362. The cubic root of 3111666520 is about 1459.9265804076.

The spelling of 3111666520 in words is "three billion, one hundred eleven million, six hundred sixty-six thousand, five hundred twenty".