1665073008 has 60 divisors (see below), whose sum is σ = 4669012920. Its totient is φ = 553938048.

The previous prime is 1665072977. The next prime is 1665073009. The reversal of 1665073008 is 8003705661.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665073009) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64258 + ... + 86366.

It is an arithmetic number, because the mean of its divisors is an integer number (77816882).

Almost surely, 2^1665073008 is an apocalyptic number.

1665073008 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1665073008 is an abundant number, since it is smaller than the sum of its proper divisors (3003939912).

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

1665073008 is a wasteful number, since it uses less digits than its factorization.

1665073008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22646 (or 22637 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 1665073008 is about 40805.3061255519. The cubic root of 1665073008 is about 1185.2530827284.

Adding to 1665073008 its reverse (8003705661), we get a palindrome (9668778669).

The spelling of 1665073008 in words is "one billion, six hundred sixty-five million, seventy-three thousand, eight".