66645054 has 24 divisors (see below), whose sum is σ = 165026160. Its totient is φ = 19041408.

The previous prime is 66645041. The next prime is 66645067. The reversal of 66645054 is 45054666.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (66645041) and next prime (66645067).

It is a Curzon number.

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, 264339 + ... + 264590.

It is an arithmetic number, because the mean of its divisors is an integer number (6876090).

Almost surely, 2^66645054 is an apocalyptic number.

66645054 is an abundant number, since it is smaller than the sum of its proper divisors (98381106).

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

66645054 is a wasteful number, since it uses less digits than its factorization.

66645054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528944 (or 528941 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 66645054 is about 8163.6422018606. The cubic root of 66645054 is about 405.4363107675.

The spelling of 66645054 in words is "sixty-six million, six hundred forty-five thousand, fifty-four".