1233445666779 has 12 divisors (see below), whose sum is σ = 1781765388000. Its totient is φ = 822240966384.

The previous prime is 1233445666763. The next prime is 1233445666793. The reversal of 1233445666779 is 9776665443321.

It is a happy number.

It is not a de Polignac number, because 1233445666779 - 2⁴ = 1233445666763 is a prime.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1233445666799) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4539379 + ... + 4803420.

It is an arithmetic number, because the mean of its divisors is an integer number (148480449000).

Almost surely, 2^{1233445666779} is an apocalyptic number.

1233445666779 is a deficient number, since it is larger than the sum of its proper divisors (548319721221).

1233445666779 is a wasteful number, since it uses less digits than its factorization.

1233445666779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9357474 (or 9357471 counting only the distinct ones).

The product of its digits is 137168640, while the sum is 63.

The spelling of 1233445666779 in words is "one trillion, two hundred thirty-three billion, four hundred forty-five million, six hundred sixty-six thousand, seven hundred seventy-nine".