66551324 has 36 divisors (see below), whose sum is σ = 135010512. Its totient is φ = 28118400.

The previous prime is 66551321. The next prime is 66551333. The reversal of 66551324 is 42315566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66551321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 285512 + ... + 285744.

It is an arithmetic number, because the mean of its divisors is an integer number (3750292).

Almost surely, 2^66551324 is an apocalyptic number.

It is an amenable number.

66551324 is an abundant number, since it is smaller than the sum of its proper divisors (68459188).

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

66551324 is a wasteful number, since it uses less digits than its factorization.

66551324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446 (or 343 counting only the distinct ones).

The product of its digits is 21600, while the sum is 32.

The square root of 66551324 is about 8157.8994845487. The cubic root of 66551324 is about 405.2461522473.

The spelling of 66551324 in words is "sixty-six million, five hundred fifty-one thousand, three hundred twenty-four".