66670648 has 32 divisors (see below), whose sum is σ = 136800000. Its totient is φ = 30209760.

The previous prime is 66670631. The next prime is 66670657. The reversal of 66670648 is 84607666.

66670648 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32353 + ... + 34351.

It is an arithmetic number, because the mean of its divisors is an integer number (4275000).

Almost surely, 2^66670648 is an apocalyptic number.

It is an amenable number.

66670648 is an abundant number, since it is smaller than the sum of its proper divisors (70129352).

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

66670648 is a wasteful number, since it uses less digits than its factorization.

66670648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2395 (or 2391 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 43.

The square root of 66670648 is about 8165.2096115164. The cubic root of 66670648 is about 405.4882046354.

The spelling of 66670648 in words is "sixty-six million, six hundred seventy thousand, six hundred forty-eight".