66601335500444 has 24 divisors (see below), whose sum is σ = 119542296871536. Its totient is φ = 32448396528000.

The previous prime is 66601335500437. The next prime is 66601335500591. The reversal of 66601335500444 is 44400553310666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250240427 + ... + 250506434.

It is an arithmetic number, because the mean of its divisors is an integer number (4980929036314).

Almost surely, 2^{66601335500444} is an apocalyptic number.

It is an amenable number.

66601335500444 is a deficient number, since it is larger than the sum of its proper divisors (52940961371092).

66601335500444 is a wasteful number, since it uses less digits than its factorization.

66601335500444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500747717 (or 500747715 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 47.

The spelling of 66601335500444 in words is "sixty-six trillion, six hundred one billion, three hundred thirty-five million, five hundred thousand, four hundred forty-four".