663020564 has 6 divisors (see below), whose sum is σ = 1160285994. Its totient is φ = 331510280.

The previous prime is 663020549. The next prime is 663020629. The reversal of 663020564 is 465020366.

It can be written as a sum of positive squares in only one way, i.e., 539632900 + 123387664 = 23230^2 + 11108^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 663020564.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82877567 + ... + 82877574.

It is an arithmetic number, because the mean of its divisors is an integer number (193380999).

Almost surely, 2^663020564 is an apocalyptic number.

It is an amenable number.

663020564 is a deficient number, since it is larger than the sum of its proper divisors (497265430).

663020564 is a wasteful number, since it uses less digits than its factorization.

663020564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165755145 (or 165755143 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 663020564 is about 25749.1856958623. The cubic root of 663020564 is about 871.9849704926.

The spelling of 663020564 in words is "six hundred sixty-three million, twenty thousand, five hundred sixty-four".