3665814642 has 96 divisors (see below), whose sum is σ = 9401184000. Its totient is φ = 1010655360.

The previous prime is 3665814641. The next prime is 3665814661. The reversal of 3665814642 is 2464185663.

3665814642 is a `hidden beast` number, since 3 + 6 + 6 + 581 + 4 + 64 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (3665814641) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 402859 + ... + 411857.

It is an arithmetic number, because the mean of its divisors is an integer number (97929000).

Almost surely, 2^3665814642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3665814642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4700592000).

3665814642 is an abundant number, since it is smaller than the sum of its proper divisors (5735369358).

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

3665814642 is a wasteful number, since it uses less digits than its factorization.

3665814642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9128 (or 9125 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The square root of 3665814642 is about 60545.9713110625. The cubic root of 3665814642 is about 1541.9022204296.

The spelling of 3665814642 in words is "three billion, six hundred sixty-five million, eight hundred fourteen thousand, six hundred forty-two".