64667473 has 16 divisors (see below), whose sum is σ = 75143376. Its totient is φ = 55111680.

The previous prime is 64667461. The next prime is 64667501. The reversal of 64667473 is 37476646.

It can be written as a sum of positive squares in 8 ways, for example, as 138384 + 64529089 = 372^2 + 8033^2 .

It is a de Polignac number, because none of the positive numbers 2^k-64667473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64667173) 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 15 ways as a sum of consecutive naturals, for example, 8953 + ... + 14473.

It is an arithmetic number, because the mean of its divisors is an integer number (4696461).

Almost surely, 2^64667473 is an apocalyptic number.

It is an amenable number.

64667473 is a deficient number, since it is larger than the sum of its proper divisors (10475903).

64667473 is a wasteful number, since it uses less digits than its factorization.

64667473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5604.

The product of its digits is 508032, while the sum is 43.

The square root of 64667473 is about 8041.6088564416. The cubic root of 64667473 is about 401.3857623627.

The spelling of 64667473 in words is "sixty-four million, six hundred sixty-seven thousand, four hundred seventy-three".