64667255 has 4 divisors (see below), whose sum is σ = 77600712. Its totient is φ = 51733800.

The previous prime is 64667249. The next prime is 64667299. The reversal of 64667255 is 55276646.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55276646 = 2 ⋅27638323.

It is a de Polignac number, because none of the positive numbers 2^k-64667255 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6466721 + ... + 6466730.

It is an arithmetic number, because the mean of its divisors is an integer number (19400178).

Almost surely, 2^64667255 is an apocalyptic number.

64667255 is a deficient number, since it is larger than the sum of its proper divisors (12933457).

64667255 is a wasteful number, since it uses less digits than its factorization.

64667255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12933456.

The product of its digits is 302400, while the sum is 41.

The square root of 64667255 is about 8041.5953019286. The cubic root of 64667255 is about 401.3853113260.

The spelling of 64667255 in words is "sixty-four million, six hundred sixty-seven thousand, two hundred fifty-five".