66413574 has 24 divisors (see below), whose sum is σ = 147718920. Its totient is φ = 22117896.

The previous prime is 66413551. The next prime is 66413593. The reversal of 66413574 is 47531466.

It is a happy number.

66413574 is a `hidden beast` number, since 6 + 641 + 3 + 5 + 7 + 4 = 666.

66413574 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×66413574² = 8821525622906952, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59332 + ... + 60440.

It is an arithmetic number, because the mean of its divisors is an integer number (6154955).

Almost surely, 2^66413574 is an apocalyptic number.

66413574 is an abundant number, since it is smaller than the sum of its proper divisors (81305346).

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

66413574 is an equidigital number, since it uses as much as digits as its factorization.

66413574 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2229 (or 1114 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 66413574 is about 8149.4523742396. The cubic root of 66413574 is about 404.9663620896.

The spelling of 66413574 in words is "sixty-six million, four hundred thirteen thousand, five hundred seventy-four".