64767 has 4 divisors (see below), whose sum is σ = 86360. Its totient is φ = 43176.

The previous prime is 64763. The next prime is 64781. The reversal of 64767 is 76746.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 64767 - 2² = 64763 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 64767.

It is not an unprimeable number, because it can be changed into a prime (64763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10792 + ... + 10797.

It is an arithmetic number, because the mean of its divisors is an integer number (21590).

2⁶⁴⁷⁶⁷ is an apocalyptic number.

64767 is a deficient number, since it is larger than the sum of its proper divisors (21593).

64767 is a wasteful number, since it uses less digits than its factorization.

64767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21592.

The product of its digits is 7056, while the sum is 30.

The square root of 64767 is about 254.4936148511. The cubic root of 64767 is about 40.1591575486.

The spelling of 64767 in words is "sixty-four thousand, seven hundred sixty-seven".