66771044 has 6 divisors (see below), whose sum is σ = 116849334. Its totient is φ = 33385520.

The previous prime is 66771031. The next prime is 66771059. The reversal of 66771044 is 44017766.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 63840100 + 2930944 = 7990^2 + 1712^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66770995 and 66771013.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8346377 + ... + 8346384.

It is an arithmetic number, because the mean of its divisors is an integer number (19474889).

Almost surely, 2^66771044 is an apocalyptic number.

It is an amenable number.

66771044 is a deficient number, since it is larger than the sum of its proper divisors (50078290).

66771044 is a wasteful number, since it uses less digits than its factorization.

66771044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16692765 (or 16692763 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 66771044 is about 8171.3550895797. The cubic root of 66771044 is about 405.6916373703.

The spelling of 66771044 in words is "sixty-six million, seven hundred seventy-one thousand, forty-four".