66240240420246 has 32 divisors (see below), whose sum is σ = 137570776666848. Its totient is φ = 21246451983360.

The previous prime is 66240240420229. The next prime is 66240240420259. The reversal of 66240240420246 is 64202404204266.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66240240420198 and 66240240420207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1844292111 + ... + 1844328026.

It is an arithmetic number, because the mean of its divisors is an integer number (4299086770839).

Almost surely, 2^{66240240420246} is an apocalyptic number.

66240240420246 is an abundant number, since it is smaller than the sum of its proper divisors (71330536246602).

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

66240240420246 is a wasteful number, since it uses less digits than its factorization.

66240240420246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3688620256.

The product of its (nonzero) digits is 884736, while the sum is 42.

The spelling of 66240240420246 in words is "sixty-six trillion, two hundred forty billion, two hundred forty million, four hundred twenty thousand, two hundred forty-six".