66550908 has 12 divisors (see below), whose sum is σ = 155285480. Its totient is φ = 22183632.

The previous prime is 66550889. The next prime is 66550909. The reversal of 66550908 is 80905566.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66550909) 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 3 ways as a sum of consecutive naturals, for example, 2772943 + ... + 2772966.

Almost surely, 2^66550908 is an apocalyptic number.

It is an amenable number.

66550908 is an abundant number, since it is smaller than the sum of its proper divisors (88734572).

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

66550908 is a wasteful number, since it uses less digits than its factorization.

66550908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5545916 (or 5545914 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 39.

The square root of 66550908 is about 8157.8739877495. The cubic root of 66550908 is about 405.2453078727.

The spelling of 66550908 in words is "sixty-six million, five hundred fifty thousand, nine hundred eight".