66055510 has 32 divisors (see below), whose sum is σ = 123524352. Its totient is φ = 25413120.

The previous prime is 66055481. The next prime is 66055511. The reversal of 66055510 is 1555066.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66055511) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 28827 + ... + 31033.

It is an arithmetic number, because the mean of its divisors is an integer number (3860136).

Almost surely, 2^66055510 is an apocalyptic number.

66055510 is a deficient number, since it is larger than the sum of its proper divisors (57468842).

66055510 is a wasteful number, since it uses less digits than its factorization.

66055510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2328.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 66055510 is about 8127.4540909192. The cubic root of 66055510 is about 404.2372679064.

The spelling of 66055510 in words is "sixty-six million, fifty-five thousand, five hundred ten".