1665063226 has 4 divisors (see below), whose sum is σ = 2497594842. Its totient is φ = 832531612.

The previous prime is 1665063209. The next prime is 1665063241. The reversal of 1665063226 is 6223605661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1161105625 + 503957601 = 34075^2 + 22449^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 416265805 + ... + 416265808.

Almost surely, 2^1665063226 is an apocalyptic number.

1665063226 is a deficient number, since it is larger than the sum of its proper divisors (832531616).

1665063226 is an equidigital number, since it uses as much as digits as its factorization.

1665063226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 832531615.

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 1665063226 is about 40805.1862635131. The cubic root of 1665063226 is about 1185.2507616754.

Adding to 1665063226 its reverse (6223605661), we get a palindrome (7888668887).

The spelling of 1665063226 in words is "one billion, six hundred sixty-five million, sixty-three thousand, two hundred twenty-six".