6165791658 has 64 divisors (see below), whose sum is σ = 14783637120. Its totient is φ = 1893580416.

The previous prime is 6165791633. The next prime is 6165791663. The reversal of 6165791658 is 8561975616.

6165791658 is a `hidden beast` number, since 6 + 1 + 6 + 579 + 1 + 65 + 8 = 666.

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

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, 375966 + ... + 392022.

It is an arithmetic number, because the mean of its divisors is an integer number (230994330).

Almost surely, 2^6165791658 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6165791658, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7391818560).

6165791658 is an abundant number, since it is smaller than the sum of its proper divisors (8617845462).

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

6165791658 is a wasteful number, since it uses less digits than its factorization.

6165791658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16628 (or 16622 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 54.

The square root of 6165791658 is about 78522.5550908782. Note that the first 3 decimals coincide. The cubic root of 6165791658 is about 1833.7056168347.

The spelling of 6165791658 in words is "six billion, one hundred sixty-five million, seven hundred ninety-one thousand, six hundred fifty-eight".