66667632 has 40 divisors (see below), whose sum is σ = 175055760. Its totient is φ = 21857280.

The previous prime is 66667583. The next prime is 66667633. The reversal of 66667632 is 23676666.

66667632 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 not an unprimeable number, because it can be changed into a prime (66667633) by changing a digit.

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, 8457 + ... + 14312.

It is an arithmetic number, because the mean of its divisors is an integer number (4376394).

Almost surely, 2^66667632 is an apocalyptic number.

It is an amenable number.

66667632 is an abundant number, since it is smaller than the sum of its proper divisors (108388128).

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

66667632 is a wasteful number, since it uses less digits than its factorization.

66667632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22841 (or 22835 counting only the distinct ones).

The product of its digits is 326592, while the sum is 42.

The square root of 66667632 is about 8165.0249234157. The cubic root of 66667632 is about 405.4820901462.

The spelling of 66667632 in words is "sixty-six million, six hundred sixty-seven thousand, six hundred thirty-two".