1653668665 has 8 divisors (see below), whose sum is σ = 2164802688. Its totient is φ = 1202668080.

The previous prime is 1653668663. The next prime is 1653668669. The reversal of 1653668665 is 5668663561.

1653668665 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1653668665 - 2¹ = 1653668663 is a prime.

It is a Duffinian number.

It is a partition number, being equal to the number of ways a set of 119 identical objects can be partitioned into subset.

It is not an unprimeable number, because it can be changed into a prime (1653668663) 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, 15033297 + ... + 15033406.

It is an arithmetic number, because the mean of its divisors is an integer number (270600336).

Almost surely, 2^1653668665 is an apocalyptic number.

It is an amenable number.

1653668665 is a deficient number, since it is larger than the sum of its proper divisors (511134023).

1653668665 is a wasteful number, since it uses less digits than its factorization.

1653668665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30066719.

The product of its digits is 4665600, while the sum is 52.

The square root of 1653668665 is about 40665.3250939913. The cubic root of 1653668665 is about 1182.5408871910.

The spelling of 1653668665 in words is "one billion, six hundred fifty-three million, six hundred sixty-eight thousand, six hundred sixty-five".