1665478383 has 16 divisors (see below), whose sum is σ = 2342313600. Its totient is φ = 1049721120.

The previous prime is 1665478349. The next prime is 1665478387. The reversal of 1665478383 is 3838745661.

It is not a de Polignac number, because 1665478383 - 2⁶ = 1665478319 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665478387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1768 + ... + 57741.

It is an arithmetic number, because the mean of its divisors is an integer number (146394600).

Almost surely, 2^1665478383 is an apocalyptic number.

1665478383 is a deficient number, since it is larger than the sum of its proper divisors (676835217).

1665478383 is a wasteful number, since it uses less digits than its factorization.

1665478383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60022.

The product of its digits is 2903040, while the sum is 51.

The square root of 1665478383 is about 40810.2730081532. The cubic root of 1665478383 is about 1185.3492612903.

The spelling of 1665478383 in words is "one billion, six hundred sixty-five million, four hundred seventy-eight thousand, three hundred eighty-three".