6616540120 has 32 divisors (see below), whose sum is σ = 14898880800. Its totient is φ = 2644542208.

The previous prime is 6616540109. The next prime is 6616540123. The reversal of 6616540120 is 210456166.

It is a super-2 number, since 2×6616540120² = 87557206319139228800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6616540123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12604 + ... + 115723.

It is an arithmetic number, because the mean of its divisors is an integer number (465590025).

Almost surely, 2^6616540120 is an apocalyptic number.

It is an amenable number.

6616540120 is an abundant number, since it is smaller than the sum of its proper divisors (8282340680).

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

6616540120 is a wasteful number, since it uses less digits than its factorization.

6616540120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129627 (or 129623 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 6616540120 is about 81342.1177496628. The cubic root of 6616540120 is about 1877.3430969179.

Adding to 6616540120 its reverse (210456166), we get a palindrome (6826996286).

The spelling of 6616540120 in words is "six billion, six hundred sixteen million, five hundred forty thousand, one hundred twenty".