1653668664 has 32 divisors (see below), whose sum is σ = 4135173120. Its totient is φ = 551089376.

The previous prime is 1653668663. The next prime is 1653668669. The reversal of 1653668664 is 4668663561.

It is a congruent number.

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, 175087 + ... + 184289.

It is an arithmetic number, because the mean of its divisors is an integer number (129224160).

Almost surely, 2^1653668664 is an apocalyptic number.

It is an amenable number.

1653668664 is an abundant number, since it is smaller than the sum of its proper divisors (2481504456).

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

1653668664 is a wasteful number, since it uses less digits than its factorization.

1653668664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16699 (or 16695 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 51.

The square root of 1653668664 is about 40665.3250816958. The cubic root of 1653668664 is about 1182.5408869527.

The spelling of 1653668664 in words is "one billion, six hundred fifty-three million, six hundred sixty-eight thousand, six hundred sixty-four".