66548644 has 12 divisors (see below), whose sum is σ = 119607964. Its totient is φ = 32374944.

The previous prime is 66548639. The next prime is 66548687. The reversal of 66548644 is 44684566.

It can be written as a sum of positive squares in 2 ways, for example, as 37063744 + 29484900 = 6088^2 + 5430^2 .

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 66548644.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 224679 + ... + 224974.

Almost surely, 2^66548644 is an apocalyptic number.

It is an amenable number.

66548644 is a deficient number, since it is larger than the sum of its proper divisors (53059320).

66548644 is a wasteful number, since it uses less digits than its factorization.

66548644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449694 (or 449692 counting only the distinct ones).

The product of its digits is 552960, while the sum is 43.

The square root of 66548644 is about 8157.7352249261. The cubic root of 66548644 is about 405.2407124644.

It can be divided in two parts, 6654864 and 4, that multiplied together give a triangular number (26619456 = T₇₂₉₆).

The spelling of 66548644 in words is "sixty-six million, five hundred forty-eight thousand, six hundred forty-four".