6215666625 has 384 divisors, whose sum is σ = 14652997632. Its totient is φ = 2566080000.

The previous prime is 6215666623. The next prime is 6215666663. The reversal of 6215666625 is 5266665126.

It is a happy number.

It is not a de Polignac number, because 6215666625 - 2¹ = 6215666623 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6215666623) by changing a digit.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 151601605 + ... + 151601645.

It is an arithmetic number, because the mean of its divisors is an integer number (38158848).

Almost surely, 2^6215666625 is an apocalyptic number.

It is an amenable number.

6215666625 is an abundant number, since it is smaller than the sum of its proper divisors (8437331007).

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

6215666625 is a wasteful number, since it uses less digits than its factorization.

6215666625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132 (or 110 counting only the distinct ones).

The product of its digits is 777600, while the sum is 45.

The square root of 6215666625 is about 78839.4991422447. The cubic root of 6215666625 is about 1838.6366145684.

The spelling of 6215666625 in words is "six billion, two hundred fifteen million, six hundred sixty-six thousand, six hundred twenty-five".