66055416 has 32 divisors (see below), whose sum is σ = 188730240. Its totient is φ = 18872928.

The previous prime is 66055399. The next prime is 66055427. The reversal of 66055416 is 61455066.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196426 + ... + 196761.

It is an arithmetic number, because the mean of its divisors is an integer number (5897820).

Almost surely, 2^66055416 is an apocalyptic number.

It is an amenable number.

66055416 is an abundant number, since it is smaller than the sum of its proper divisors (122674824).

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

66055416 is a wasteful number, since it uses less digits than its factorization.

66055416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393203 (or 393199 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 66055416 is about 8127.4483080485. The cubic root of 66055416 is about 404.2370761569.

It can be divided in two parts, 6605 and 5416, that added together give a palindrome (12021).

The spelling of 66055416 in words is "sixty-six million, fifty-five thousand, four hundred sixteen".