664425511 has 8 divisors (see below), whose sum is σ = 700452864. Its totient is φ = 629310360.

The previous prime is 664425469. The next prime is 664425529. The reversal of 664425511 is 115524466.

664425511 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 664425511 - 2¹³ = 664417319 is a prime.

It is a super-2 number, since 2×664425511² = 882922519335222242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664423511) 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, 226555 + ... + 229468.

It is an arithmetic number, because the mean of its divisors is an integer number (87556608).

Almost surely, 2^664425511 is an apocalyptic number.

664425511 is a deficient number, since it is larger than the sum of its proper divisors (36027353).

664425511 is a wasteful number, since it uses less digits than its factorization.

664425511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456101.

The product of its digits is 28800, while the sum is 34.

The square root of 664425511 is about 25776.4526457773. The cubic root of 664425511 is about 872.6004508282.

Adding to 664425511 its reverse (115524466), we get a palindrome (779949977).

The spelling of 664425511 in words is "six hundred sixty-four million, four hundred twenty-five thousand, five hundred eleven".