64722 has 32 divisors (see below), whose sum is σ = 156672. Its totient is φ = 17424.

The previous prime is 64717. The next prime is 64747. The reversal of 64722 is 22746.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a plaindrome in base 11.

It is a congruent number.

It is an unprimeable number.

64722 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 933 + ... + 999.

It is an arithmetic number, because the mean of its divisors is an integer number (4896).

2⁶⁴⁷²² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64722, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78336).

64722 is an abundant number, since it is smaller than the sum of its proper divisors (91950).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64722 is a wasteful number, since it uses less digits than its factorization.

64722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102.

The product of its digits is 672, while the sum is 21.

The square root of 64722 is about 254.4051886263. The cubic root of 64722 is about 40.1498545559.

The spelling of 64722 in words is "sixty-four thousand, seven hundred twenty-two".