1664232643366 has 16 divisors (see below), whose sum is σ = 2556189642240. Its totient is φ = 812262858120.

The previous prime is 1664232643361. The next prime is 1664232643379. The reversal of 1664232643366 is 6633462324661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664232643361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23321370 + ... + 23392621.

It is an arithmetic number, because the mean of its divisors is an integer number (159761852640).

Almost surely, 2^{1664232643366} is an apocalyptic number.

1664232643366 is a deficient number, since it is larger than the sum of its proper divisors (891956998874).

1664232643366 is a wasteful number, since it uses less digits than its factorization.

1664232643366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46714419.

The product of its digits is 13436928, while the sum is 52.

The spelling of 1664232643366 in words is "one trillion, six hundred sixty-four billion, two hundred thirty-two million, six hundred forty-three thousand, three hundred sixty-six".