66452620 has 24 divisors (see below), whose sum is σ = 150285744. Its totient is φ = 24536256.

The previous prime is 66452593. The next prime is 66452621. The reversal of 66452620 is 2625466.

It is not an unprimeable number, because it can be changed into a prime (66452621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127534 + ... + 128053.

It is an arithmetic number, because the mean of its divisors is an integer number (6261906).

Almost surely, 2^66452620 is an apocalyptic number.

It is an amenable number.

66452620 is an abundant number, since it is smaller than the sum of its proper divisors (83833124).

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

66452620 is a wasteful number, since it uses less digits than its factorization.

66452620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255609 (or 255607 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 66452620 is about 8151.8476433260. The cubic root of 66452620 is about 405.0457094169.

The spelling of 66452620 in words is "sixty-six million, four hundred fifty-two thousand, six hundred twenty".