66006244242440 has 64 divisors (see below), whose sum is σ = 154075201920000. Its totient is φ = 25422408126720.

The previous prime is 66006244242353. The next prime is 66006244242509. The reversal of 66006244242440 is 4424244260066.

It is a junction number, because it is equal to n+sod(n) for n = 66006244242391 and 66006244242400.

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 in 15 ways as a sum of consecutive naturals, for example, 133499075 + ... + 133992594.

It is an arithmetic number, because the mean of its divisors is an integer number (2407425030000).

Almost surely, 2^{66006244242440} is an apocalyptic number.

It is an amenable number.

66006244242440 is an abundant number, since it is smaller than the sum of its proper divisors (88068957677560).

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

66006244242440 is a wasteful number, since it uses less digits than its factorization.

66006244242440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267491910 (or 267491906 counting only the distinct ones).

The product of its (nonzero) digits is 1769472, while the sum is 44.

The spelling of 66006244242440 in words is "sixty-six trillion, six billion, two hundred forty-four million, two hundred forty-two thousand, four hundred forty".