6616517619972 has 48 divisors (see below), whose sum is σ = 16626884504832. Its totient is φ = 2035758109440.

The previous prime is 6616517619931. The next prime is 6616517619973. The reversal of 6616517619972 is 2799167156166.

It is not an unprimeable number, because it can be changed into a prime (6616517619973) 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, 2474248 + ... + 4399424.

It is an arithmetic number, because the mean of its divisors is an integer number (346393427184).

Almost surely, 2^{6616517619972} is an apocalyptic number.

It is an amenable number.

6616517619972 is an abundant number, since it is smaller than the sum of its proper divisors (10010366884860).

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

6616517619972 is a wasteful number, since it uses less digits than its factorization.

6616517619972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1947228 (or 1947226 counting only the distinct ones).

The product of its digits is 51438240, while the sum is 66.

The spelling of 6616517619972 in words is "six trillion, six hundred sixteen billion, five hundred seventeen million, six hundred nineteen thousand, nine hundred seventy-two".