66454326 has 48 divisors (see below), whose sum is σ = 154440000. Its totient is φ = 20577024.

The previous prime is 66454321. The next prime is 66454327. The reversal of 66454326 is 62345466.

66454326 is a `hidden beast` number, since 6 + 645 + 4 + 3 + 2 + 6 = 666.

It is a super-2 number, since 2×66454326² = 8832354888228552, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66454321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22800 + ... + 25548.

It is an arithmetic number, because the mean of its divisors is an integer number (3217500).

Almost surely, 2^66454326 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66454326, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77220000).

66454326 is an abundant number, since it is smaller than the sum of its proper divisors (87985674).

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

66454326 is a wasteful number, since it uses less digits than its factorization.

66454326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2853 (or 2850 counting only the distinct ones).

The product of its digits is 103680, while the sum is 36.

The square root of 66454326 is about 8151.9522815090. The cubic root of 66454326 is about 405.0491755560.

The spelling of 66454326 in words is "sixty-six million, four hundred fifty-four thousand, three hundred twenty-six".