165663130 has 16 divisors (see below), whose sum is σ = 315734760. Its totient is φ = 62367232.

The previous prime is 165663077. The next prime is 165663143. The reversal of 165663130 is 31366561.

It can be written as a sum of positive squares in 4 ways, for example, as 162639009 + 3024121 = 12753^2 + 1739^2 .

It is a junction number, because it is equal to n+sod(n) for n = 165663092 and 165663101.

It is an unprimeable number.

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, 487075 + ... + 487414.

Almost surely, 2^165663130 is an apocalyptic number.

165663130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165663130 is a deficient number, since it is larger than the sum of its proper divisors (150071630).

165663130 is a wasteful number, since it uses less digits than its factorization.

165663130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 974513.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 165663130 is about 12871.0189961790. The cubic root of 165663130 is about 549.2144487990.

The spelling of 165663130 in words is "one hundred sixty-five million, six hundred sixty-three thousand, one hundred thirty".