6615218052 has 24 divisors (see below), whose sum is σ = 17150565600. Its totient is φ = 2205072648.

The previous prime is 6615218033. The next prime is 6615218059. The reversal of 6615218052 is 2508125166.

6615218052 is a `hidden beast` number, since 6 + 6 + 1 + 521 + 80 + 52 = 666.

It is a super-2 number, since 2×6615218052² = 87522219751013349408, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 6615217998 and 6615218016.

It is not an unprimeable number, because it can be changed into a prime (6615218059) 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, 30625902 + ... + 30626117.

It is an arithmetic number, because the mean of its divisors is an integer number (714606900).

Almost surely, 2^6615218052 is an apocalyptic number.

It is an amenable number.

6615218052 is an abundant number, since it is smaller than the sum of its proper divisors (10535347548).

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

6615218052 is a wasteful number, since it uses less digits than its factorization.

6615218052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61252032 (or 61252024 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 6615218052 is about 81333.9907541736. The cubic root of 6615218052 is about 1877.2180496617.

The spelling of 6615218052 in words is "six billion, six hundred fifteen million, two hundred eighteen thousand, fifty-two".