1665025630 has 16 divisors (see below), whose sum is σ = 2997553680. Its totient is φ = 665897472.

The previous prime is 1665025627. The next prime is 1665025631. The reversal of 1665025630 is 365205661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665025631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74302 + ... + 94078.

It is an arithmetic number, because the mean of its divisors is an integer number (187347105).

Almost surely, 2^1665025630 is an apocalyptic number.

1665025630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1665025630 is a deficient number, since it is larger than the sum of its proper divisors (1332528050).

1665025630 is a wasteful number, since it uses less digits than its factorization.

1665025630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28203.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 1665025630 is about 40804.7255841771. The cubic root of 1665025630 is about 1185.2418408884.

The spelling of 1665025630 in words is "one billion, six hundred sixty-five million, twenty-five thousand, six hundred thirty".