663020767 has 4 divisors (see below), whose sum is σ = 665662536. Its totient is φ = 660379000.

The previous prime is 663020753. The next prime is 663020807. The reversal of 663020767 is 767020366.

It is a happy number.

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 663020767 - 2¹⁹ = 662496479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663320767) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1320508 + ... + 1321009.

It is an arithmetic number, because the mean of its divisors is an integer number (166415634).

Almost surely, 2^663020767 is an apocalyptic number.

663020767 is a deficient number, since it is larger than the sum of its proper divisors (2641769).

663020767 is a wasteful number, since it uses less digits than its factorization.

663020767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2641768.

The product of its (nonzero) digits is 63504, while the sum is 37.

The square root of 663020767 is about 25749.1896377342. The cubic root of 663020767 is about 871.9850594858.

The spelling of 663020767 in words is "six hundred sixty-three million, twenty thousand, seven hundred sixty-seven".