66649006 has 4 divisors (see below), whose sum is σ = 99973512. Its totient is φ = 33324502.

The previous prime is 66648983. The next prime is 66649043. The reversal of 66649006 is 60094666.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60094666 = 2 ⋅30047333.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16662250 + ... + 16662253.

It is an arithmetic number, because the mean of its divisors is an integer number (24993378).

Almost surely, 2^66649006 is an apocalyptic number.

66649006 is a deficient number, since it is larger than the sum of its proper divisors (33324506).

66649006 is a wasteful number, since it uses less digits than its factorization.

66649006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33324505.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 66649006 is about 8163.8842470971. The cubic root of 66649006 is about 405.4443246287. Note that the first 3 decimals are identical.

The spelling of 66649006 in words is "sixty-six million, six hundred forty-nine thousand, six".