664551467 has 4 divisors (see below), whose sum is σ = 699527880. Its totient is φ = 629575056.

The previous prime is 664551421. The next prime is 664551469. The reversal of 664551467 is 764155466.

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 664551467 - 2¹⁸ = 664289323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664551469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17488178 + ... + 17488215.

It is an arithmetic number, because the mean of its divisors is an integer number (174881970).

Almost surely, 2^664551467 is an apocalyptic number.

664551467 is a deficient number, since it is larger than the sum of its proper divisors (34976413).

664551467 is a wasteful number, since it uses less digits than its factorization.

664551467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34976412.

The product of its digits is 604800, while the sum is 44.

The square root of 664551467 is about 25778.8957676624. The cubic root of 664551467 is about 872.6555873415.

The spelling of 664551467 in words is "six hundred sixty-four million, five hundred fifty-one thousand, four hundred sixty-seven".