664063769 has 8 divisors (see below), whose sum is σ = 666845952. Its totient is φ = 661288320.

The previous prime is 664063739. The next prime is 664063811. The reversal of 664063769 is 967360466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 664063769 - 2¹⁶ = 663998233 is a prime.

It is a super-2 number, since 2×664063769² = 881961378596970722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664063709) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 291017 + ... + 293289.

It is an arithmetic number, because the mean of its divisors is an integer number (83355744).

Almost surely, 2^664063769 is an apocalyptic number.

It is an amenable number.

664063769 is a deficient number, since it is larger than the sum of its proper divisors (2782183).

664063769 is a wasteful number, since it uses less digits than its factorization.

664063769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3367.

The product of its (nonzero) digits is 979776, while the sum is 47.

The square root of 664063769 is about 25769.4347823153. The cubic root of 664063769 is about 872.4420615982.

The spelling of 664063769 in words is "six hundred sixty-four million, sixty-three thousand, seven hundred sixty-nine".