64761 has 4 divisors (see below), whose sum is σ = 86352. Its totient is φ = 43172.

The previous prime is 64747. The next prime is 64763. The reversal of 64761 is 16746.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64761 - 2⁷ = 64633 is a prime.

It is a D-number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 64761.

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, 10791 + ... + 10796.

It is an arithmetic number, because the mean of its divisors is an integer number (21588).

2⁶⁴⁷⁶¹ is an apocalyptic number.

It is an amenable number.

64761 is a deficient number, since it is larger than the sum of its proper divisors (21591).

64761 is a wasteful number, since it uses less digits than its factorization.

64761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21590.

The product of its digits is 1008, while the sum is 24.

The square root of 64761 is about 254.4818264631. The cubic root of 64761 is about 40.1579173986.

The spelling of 64761 in words is "sixty-four thousand, seven hundred sixty-one".