663020611 has 4 divisors (see below), whose sum is σ = 723295224. Its totient is φ = 602746000.

The previous prime is 663020549. The next prime is 663020629. The reversal of 663020611 is 116020366.

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

It is a cyclic number.

It is not a de Polignac number, because 663020611 - 2¹¹ = 663018563 is a prime.

It is a super-2 number, since 2×663020611² = 879192661221626642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663020671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30137290 + ... + 30137311.

It is an arithmetic number, because the mean of its divisors is an integer number (180823806).

Almost surely, 2^663020611 is an apocalyptic number.

663020611 is a deficient number, since it is larger than the sum of its proper divisors (60274613).

663020611 is a wasteful number, since it uses less digits than its factorization.

663020611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60274612.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 663020611 is about 25749.1866085125. The cubic root of 663020611 is about 871.9849910969.

Adding to 663020611 its reverse (116020366), we get a palindrome (779040977).

The spelling of 663020611 in words is "six hundred sixty-three million, twenty thousand, six hundred eleven".