66622044 has 12 divisors (see below), whose sum is σ = 155451464. Its totient is φ = 22207344.

The previous prime is 66622021. The next prime is 66622057. The reversal of 66622044 is 44022666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2775907 + ... + 2775930.

Almost surely, 2^66622044 is an apocalyptic number.

It is an amenable number.

66622044 is an abundant number, since it is smaller than the sum of its proper divisors (88829420).

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

66622044 is a wasteful number, since it uses less digits than its factorization.

66622044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5551844 (or 5551842 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 66622044 is about 8162.2327827623. The cubic root of 66622044 is about 405.3896448220.

The spelling of 66622044 in words is "sixty-six million, six hundred twenty-two thousand, forty-four".