1666765344 has 96 divisors (see below), whose sum is σ = 4638767616. Its totient is φ = 523100160.

The previous prime is 1666765337. The next prime is 1666765349. The reversal of 1666765344 is 4435676661.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 1666765293 and 1666765302.

It is not an unprimeable number, because it can be changed into a prime (1666765349) 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, 102544 + ... + 117680.

It is an arithmetic number, because the mean of its divisors is an integer number (48320496).

Almost surely, 2^1666765344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1666765344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2319383808).

1666765344 is an abundant number, since it is smaller than the sum of its proper divisors (2972002272).

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

1666765344 is a wasteful number, since it uses less digits than its factorization.

1666765344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15218 (or 15210 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 48.

The square root of 1666765344 is about 40826.0375740776. The cubic root of 1666765344 is about 1185.6545000180.

The spelling of 1666765344 in words is "one billion, six hundred sixty-six million, seven hundred sixty-five thousand, three hundred forty-four".