66486416 has 10 divisors (see below), whose sum is σ = 128817462. Its totient is φ = 33243200.

The previous prime is 66486391. The next prime is 66486421. The reversal of 66486416 is 61468466.

It can be written as a sum of positive squares in only one way, i.e., 56851600 + 9634816 = 7540^2 + 3104^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2077685 + ... + 2077716.

Almost surely, 2^66486416 is an apocalyptic number.

It is an amenable number.

66486416 is a deficient number, since it is larger than the sum of its proper divisors (62331046).

66486416 is a wasteful number, since it uses less digits than its factorization.

66486416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4155409 (or 4155403 counting only the distinct ones).

The product of its digits is 165888, while the sum is 41.

The square root of 66486416 is about 8153.9202841333. The cubic root of 66486416 is about 405.1143628668.

The spelling of 66486416 in words is "sixty-six million, four hundred eighty-six thousand, four hundred sixteen".