1665893934 has 48 divisors (see below), whose sum is σ = 3742427520. Its totient is φ = 534997440.

The previous prime is 1665893927. The next prime is 1665893939. The reversal of 1665893934 is 4393985661.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665893939) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 121264 + ... + 134300.

It is an arithmetic number, because the mean of its divisors is an integer number (77967240).

Almost surely, 2^1665893934 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1665893934, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1871213760).

1665893934 is an abundant number, since it is smaller than the sum of its proper divisors (2076533586).

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

1665893934 is a wasteful number, since it uses less digits than its factorization.

1665893934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13305 (or 13302 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 54.

The square root of 1665893934 is about 40815.3639454556. The cubic root of 1665893934 is about 1185.4478379945.

It can be divided in two parts, 16658 and 93934, that added together give a cube (110592 = 48³).

The spelling of 1665893934 in words is "one billion, six hundred sixty-five million, eight hundred ninety-three thousand, nine hundred thirty-four".