66656246 has 16 divisors (see below), whose sum is σ = 102435840. Its totient is φ = 32515560.

The previous prime is 66656243. The next prime is 66656257. The reversal of 66656246 is 64265666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66656243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34691 + ... + 36561.

It is an arithmetic number, because the mean of its divisors is an integer number (6402240).

Almost surely, 2^66656246 is an apocalyptic number.

66656246 is a deficient number, since it is larger than the sum of its proper divisors (35779594).

66656246 is a wasteful number, since it uses less digits than its factorization.

66656246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2299.

The product of its digits is 311040, while the sum is 41.

The square root of 66656246 is about 8164.3276514358. The cubic root of 66656246 is about 405.4590050708.

The spelling of 66656246 in words is "sixty-six million, six hundred fifty-six thousand, two hundred forty-six".