1665073518 has 8 divisors (see below), whose sum is σ = 3330147048. Its totient is φ = 555024504.

The previous prime is 1665073511. The next prime is 1665073547. The reversal of 1665073518 is 8153705661.

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

1665073518 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 1665073518.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665073511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138756121 + ... + 138756132.

It is an arithmetic number, because the mean of its divisors is an integer number (416268381).

Almost surely, 2^1665073518 is an apocalyptic number.

1665073518 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1665073518 is a wasteful number, since it uses less digits than its factorization.

1665073518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277512258.

The product of its (nonzero) digits is 151200, while the sum is 42.

The square root of 1665073518 is about 40805.3123747387. The cubic root of 1665073518 is about 1185.2532037399.

The spelling of 1665073518 in words is "one billion, six hundred sixty-five million, seventy-three thousand, five hundred eighteen".