66206686744746 has 24 divisors (see below), whose sum is σ = 143448076474560. Its totient is φ = 22068856320936.

The previous prime is 66206686744733. The next prime is 66206686744753. The reversal of 66206686744746 is 64744768660266.

66206686744746 is a `hidden beast` number, since 6 + 6 + 2 + 0 + 6 + 6 + 86 + 74 + 474 + 6 = 666.

It is a super-3 number, since 3×66206686744746³ (a number of 42 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8217871 + ... + 14140253.

It is an arithmetic number, because the mean of its divisors is an integer number (5977003186440).

Almost surely, 2^{66206686744746} is an apocalyptic number.

66206686744746 is an abundant number, since it is smaller than the sum of its proper divisors (77241389729814).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66206686744746 is a wasteful number, since it uses less digits than its factorization.

66206686744746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6543450 (or 6543447 counting only the distinct ones).

The product of its (nonzero) digits is 2341011456, while the sum is 72.

The spelling of 66206686744746 in words is "sixty-six trillion, two hundred six billion, six hundred eighty-six million, seven hundred forty-four thousand, seven hundred forty-six".