66677444 has 6 divisors (see below), whose sum is σ = 116685534. Its totient is φ = 33338720.

The previous prime is 66677431. The next prime is 66677459. The reversal of 66677444 is 44477666.

It can be written as a sum of positive squares in only one way, i.e., 65934400 + 743044 = 8120^2 + 862^2 .

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 66677395 and 66677404.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8334677 + ... + 8334684.

It is an arithmetic number, because the mean of its divisors is an integer number (19447589).

Almost surely, 2^66677444 is an apocalyptic number.

It is an amenable number.

66677444 is a deficient number, since it is larger than the sum of its proper divisors (50008090).

66677444 is a wasteful number, since it uses less digits than its factorization.

66677444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16669365 (or 16669363 counting only the distinct ones).

The product of its digits is 677376, while the sum is 44.

The square root of 66677444 is about 8165.6257567929. The cubic root of 66677444 is about 405.5019818337.

The spelling of 66677444 in words is "sixty-six million, six hundred seventy-seven thousand, four hundred forty-four".