66746922 has 64 divisors (see below), whose sum is σ = 154344960. Its totient is φ = 19051200.

The previous prime is 66746917. The next prime is 66746929. The reversal of 66746922 is 22964766.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (66746929) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81897 + ... + 82707.

It is an arithmetic number, because the mean of its divisors is an integer number (2411640).

Almost surely, 2^66746922 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66746922, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77172480).

66746922 is an abundant number, since it is smaller than the sum of its proper divisors (87598038).

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

66746922 is a wasteful number, since it uses less digits than its factorization.

66746922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899.

The product of its digits is 217728, while the sum is 42.

The square root of 66746922 is about 8169.8789464716. The cubic root of 66746922 is about 405.6427775064.

The spelling of 66746922 in words is "sixty-six million, seven hundred forty-six thousand, nine hundred twenty-two".