66416454 has 24 divisors (see below), whose sum is σ = 154972272. Its totient is φ = 20435760.

The previous prime is 66416447. The next prime is 66416503. The reversal of 66416454 is 45461466.

66416454 is a `hidden beast` number, since 6 + 6 + 4 + 1 + 645 + 4 = 666.

It is a super-2 number, since 2×66416454² = 8822290723868232, 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 (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 141682 + ... + 142149.

It is an arithmetic number, because the mean of its divisors is an integer number (6457178).

Almost surely, 2^66416454 is an apocalyptic number.

66416454 is an abundant number, since it is smaller than the sum of its proper divisors (88555818).

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

66416454 is a wasteful number, since it uses less digits than its factorization.

66416454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283852 (or 283849 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 66416454 is about 8149.6290713136. The cubic root of 66416454 is about 404.9722157437.

The spelling of 66416454 in words is "sixty-six million, four hundred sixteen thousand, four hundred fifty-four".