66860444 has 12 divisors (see below), whose sum is σ = 133720944. Its totient is φ = 28654464.

The previous prime is 66860429. The next prime is 66860467. The reversal of 66860444 is 44406866.

66860444 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 66860398 and 66860407.

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, 1193909 + ... + 1193964.

It is an arithmetic number, because the mean of its divisors is an integer number (11143412).

Almost surely, 2^66860444 is an apocalyptic number.

It is an amenable number.

66860444 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66860444 is a wasteful number, since it uses less digits than its factorization.

66860444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2387884 (or 2387882 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 38.

The square root of 66860444 is about 8176.8235886559. The cubic root of 66860444 is about 405.8726173052.

The spelling of 66860444 in words is "sixty-six million, eight hundred sixty thousand, four hundred forty-four".