21660614026446 has 8 divisors (see below), whose sum is σ = 43321228052904. Its totient is φ = 7220204675480.

The previous prime is 21660614026423. The next prime is 21660614026453. The reversal of 21660614026446 is 64462041606612.

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

21660614026446 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21660614026395 and 21660614026404.

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, 1805051168865 + ... + 1805051168876.

It is an arithmetic number, because the mean of its divisors is an integer number (5415153506613).

Almost surely, 2^{21660614026446} is an apocalyptic number.

21660614026446 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21660614026446 is a wasteful number, since it uses less digits than its factorization.

21660614026446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3610102337746.

The product of its (nonzero) digits is 1990656, while the sum is 48.

The spelling of 21660614026446 in words is "twenty-one trillion, six hundred sixty billion, six hundred fourteen million, twenty-six thousand, four hundred forty-six".