2661666554446 has 24 divisors (see below), whose sum is σ = 4174009625520. Its totient is φ = 1272856406976.

The previous prime is 2661666554387. The next prime is 2661666554473. The reversal of 2661666554446 is 6444556661662.

It is a happy number.

2661666554446 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12291366 + ... + 12506038.

It is an arithmetic number, because the mean of its divisors is an integer number (173917067730).

Almost surely, 2^{2661666554446} is an apocalyptic number.

2661666554446 is a deficient number, since it is larger than the sum of its proper divisors (1512343071074).

2661666554446 is a wasteful number, since it uses less digits than its factorization.

2661666554446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226440 (or 226417 counting only the distinct ones).

The product of its digits is 149299200, while the sum is 61.

The spelling of 2661666554446 in words is "two trillion, six hundred sixty-one billion, six hundred sixty-six million, five hundred fifty-four thousand, four hundred forty-six".