6619939704 has 128 divisors (see below), whose sum is σ = 21528460800. Its totient is φ = 1845262080.

The previous prime is 6619939687. The next prime is 6619939717. The reversal of 6619939704 is 4079399166.

6619939704 is a `hidden beast` number, since 66 + 199 + 397 + 0 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8599 + ... + 115385.

It is an arithmetic number, because the mean of its divisors is an integer number (168191100).

Almost surely, 2^6619939704 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 6619939704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10764230400).

6619939704 is an abundant number, since it is smaller than the sum of its proper divisors (14908521096).

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

6619939704 is a wasteful number, since it uses less digits than its factorization.

6619939704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106850 (or 106840 counting only the distinct ones).

The product of its (nonzero) digits is 2204496, while the sum is 54.

The square root of 6619939704 is about 81363.0118911536. The cubic root of 6619939704 is about 1877.6645686989.

The spelling of 6619939704 in words is "six billion, six hundred nineteen million, nine hundred thirty-nine thousand, seven hundred four".