664786803067 has 4 divisors (see below), whose sum is σ = 664789344120. Its totient is φ = 664784262016.

The previous prime is 664786803059. The next prime is 664786803077. The reversal of 664786803067 is 760308687466.

664786803067 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 664786803067 - 2³ = 664786803059 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 664786802996 and 664786803014.

It is not an unprimeable number, because it can be changed into a prime (664786803007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 826333 + ... + 1418590.

It is an arithmetic number, because the mean of its divisors is an integer number (166197336030).

Almost surely, 2^664786803067 is an apocalyptic number.

664786803067 is a deficient number, since it is larger than the sum of its proper divisors (2541053).

664786803067 is a wasteful number, since it uses less digits than its factorization.

664786803067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2541052.

The product of its (nonzero) digits is 48771072, while the sum is 61.

The spelling of 664786803067 in words is "six hundred sixty-four billion, seven hundred eighty-six million, eight hundred three thousand, sixty-seven".