6516697212 has 84 divisors (see below), whose sum is σ = 17194367736. Its totient is φ = 2160056160.

The previous prime is 6516697211. The next prime is 6516697223. The reversal of 6516697212 is 2127966156.

6516697212 is a `hidden beast` number, since 6 + 516 + 69 + 72 + 1 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6516697211) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 521623 + ... + 533969.

It is an arithmetic number, because the mean of its divisors is an integer number (204694854).

Almost surely, 2^6516697212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6516697212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8597183868).

6516697212 is an abundant number, since it is smaller than the sum of its proper divisors (10677670524).

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

6516697212 is a wasteful number, since it uses less digits than its factorization.

6516697212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12550 (or 12533 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 6516697212 is about 80726.0627802446. The cubic root of 6516697212 is about 1867.8522256230.

The spelling of 6516697212 in words is "six billion, five hundred sixteen million, six hundred ninety-seven thousand, two hundred twelve".