66001648 has 40 divisors (see below), whose sum is σ = 131241600. Its totient is φ = 32144064.

The previous prime is 66001631. The next prime is 66001657. The reversal of 66001648 is 84610066.

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, 130965 + ... + 131467.

It is an arithmetic number, because the mean of its divisors is an integer number (3281040).

Almost surely, 2^66001648 is an apocalyptic number.

It is an amenable number.

66001648 is a deficient number, since it is larger than the sum of its proper divisors (65239952).

66001648 is a wasteful number, since it uses less digits than its factorization.

66001648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709 (or 703 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 66001648 is about 8124.1398313914. The cubic root of 66001648 is about 404.1273656522.

The spelling of 66001648 in words is "sixty-six million, one thousand, six hundred forty-eight".