66555006 has 16 divisors (see below), whose sum is σ = 152125824. Its totient is φ = 19015704.

The previous prime is 66554987. The next prime is 66555023. The reversal of 66555006 is 60055566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 792280 + ... + 792363.

It is an arithmetic number, because the mean of its divisors is an integer number (9507864).

Almost surely, 2^66555006 is an apocalyptic number.

66555006 is an abundant number, since it is smaller than the sum of its proper divisors (85570818).

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

66555006 is a wasteful number, since it uses less digits than its factorization.

66555006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1584655.

The product of its (nonzero) digits is 27000, while the sum is 33.

The square root of 66555006 is about 8158.1251522638. The cubic root of 66555006 is about 405.2536256214.

The spelling of 66555006 in words is "sixty-six million, five hundred fifty-five thousand, six".