165630540 has 24 divisors (see below), whose sum is σ = 463765680. Its totient is φ = 44168128.

The previous prime is 165630527. The next prime is 165630547. The reversal of 165630540 is 45036561.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 165630498 and 165630507.

It is not an unprimeable number, because it can be changed into a prime (165630547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1380195 + ... + 1380314.

It is an arithmetic number, because the mean of its divisors is an integer number (19323570).

Almost surely, 2^165630540 is an apocalyptic number.

165630540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165630540 is an abundant number, since it is smaller than the sum of its proper divisors (298135140).

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

165630540 is a wasteful number, since it uses less digits than its factorization.

165630540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2760521 (or 2760519 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 165630540 is about 12869.7529113810. The cubic root of 165630540 is about 549.1784317872.

The spelling of 165630540 in words is "one hundred sixty-five million, six hundred thirty thousand, five hundred forty".