6619860654 has 32 divisors (see below), whose sum is σ = 14646769920. Its totient is φ = 1977763200.

The previous prime is 6619860647. The next prime is 6619860659. The reversal of 6619860654 is 4560689166.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 6619860597 and 6619860606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6619860659) 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, 701659 + ... + 711030.

It is an arithmetic number, because the mean of its divisors is an integer number (457711560).

Almost surely, 2^6619860654 is an apocalyptic number.

6619860654 is an abundant number, since it is smaller than the sum of its proper divisors (8026909266).

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

6619860654 is a wasteful number, since it uses less digits than its factorization.

6619860654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1412776.

The product of its (nonzero) digits is 1866240, while the sum is 51.

The square root of 6619860654 is about 81362.5261038520. The cubic root of 6619860654 is about 1877.6570948154.

The spelling of 6619860654 in words is "six billion, six hundred nineteen million, eight hundred sixty thousand, six hundred fifty-four".