66423732 has 24 divisors (see below), whose sum is σ = 159178656. Its totient is φ = 21542688.

The previous prime is 66423719. The next prime is 66423739. The reversal of 66423732 is 23732466.

It is a super-2 number, since 2×66423732² = 8824224345615648, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66423693 and 66423702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66423739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74358 + ... + 75245.

It is an arithmetic number, because the mean of its divisors is an integer number (6632444).

Almost surely, 2^66423732 is an apocalyptic number.

It is an amenable number.

66423732 is an abundant number, since it is smaller than the sum of its proper divisors (92754924).

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

66423732 is a wasteful number, since it uses less digits than its factorization.

66423732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149647 (or 149645 counting only the distinct ones).

The product of its digits is 36288, while the sum is 33.

The square root of 66423732 is about 8150.0755824716. The cubic root of 66423732 is about 404.9870076612.

The spelling of 66423732 in words is "sixty-six million, four hundred twenty-three thousand, seven hundred thirty-two".