7878266652 has 24 divisors (see below), whose sum is σ = 18516805776. Its totient is φ = 2606919808.

The previous prime is 7878266651. The next prime is 7878266663. The reversal of 7878266652 is 2566628787.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 7878266592 and 7878266601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7878266651) 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, 2394423 + ... + 2397710.

It is an arithmetic number, because the mean of its divisors is an integer number (771533574).

Almost surely, 2^7878266652 is an apocalyptic number.

It is an amenable number.

7878266652 is an abundant number, since it is smaller than the sum of its proper divisors (10638539124).

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

7878266652 is a wasteful number, since it uses less digits than its factorization.

7878266652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4792277 (or 4792275 counting only the distinct ones).

The product of its digits is 13547520, while the sum is 57.

The square root of 7878266652 is about 88759.6003370903. The cubic root of 7878266652 is about 1989.8036599974.

The spelling of 7878266652 in words is "seven billion, eight hundred seventy-eight million, two hundred sixty-six thousand, six hundred fifty-two".