665503130 has 16 divisors (see below), whose sum is σ = 1212339744. Its totient is φ = 262993680.

The previous prime is 665503121. The next prime is 665503151. The reversal of 665503130 is 31305566.

It is a junction number, because it is equal to n+sod(n) for n = 665503093 and 665503102.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 400076 + ... + 401735.

It is an arithmetic number, because the mean of its divisors is an integer number (75771234).

Almost surely, 2^665503130 is an apocalyptic number.

665503130 is a deficient number, since it is larger than the sum of its proper divisors (546836614).

665503130 is a wasteful number, since it uses less digits than its factorization.

665503130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801901.

The product of its (nonzero) digits is 8100, while the sum is 29.

The square root of 665503130 is about 25797.3473442523. The cubic root of 665503130 is about 873.0719473311.

Adding to 665503130 its reverse (31305566), we get a palindrome (696808696).

The spelling of 665503130 in words is "six hundred sixty-five million, five hundred three thousand, one hundred thirty".