66440505620366 has 8 divisors (see below), whose sum is σ = 102875621605824. Its totient is φ = 32148631751760.

The previous prime is 66440505620317. The next prime is 66440505620497. The reversal of 66440505620366 is 66302650504466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 535810529135 + ... + 535810529258.

It is an arithmetic number, because the mean of its divisors is an integer number (12859452700728).

Almost surely, 2^{66440505620366} is an apocalyptic number.

66440505620366 is a deficient number, since it is larger than the sum of its proper divisors (36435115985458).

66440505620366 is a wasteful number, since it uses less digits than its factorization.

66440505620366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1071621058426.

The product of its (nonzero) digits is 18662400, while the sum is 53.

The spelling of 66440505620366 in words is "sixty-six trillion, four hundred forty billion, five hundred five million, six hundred twenty thousand, three hundred sixty-six".