1665087930 has 48 divisors (see below), whose sum is σ = 4722797664. Its totient is φ = 403657440.

The previous prime is 1665087889. The next prime is 1665087947. The reversal of 1665087930 is 397805661.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 839964 + ... + 841943.

It is an arithmetic number, because the mean of its divisors is an integer number (98391618).

Almost surely, 2^1665087930 is an apocalyptic number.

1665087930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1665087930 is an abundant number, since it is smaller than the sum of its proper divisors (3057709734).

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

1665087930 is a wasteful number, since it uses less digits than its factorization.

1665087930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1681931 (or 1681928 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 1665087930 is about 40805.4889690100. The cubic root of 1665087930 is about 1185.2566233727.

The spelling of 1665087930 in words is "one billion, six hundred sixty-five million, eighty-seven thousand, nine hundred thirty".