1444210220666 has 8 divisors (see below), whose sum is σ = 2166731225940. Its totient is φ = 721966478688.

The previous prime is 1444210220657. The next prime is 1444210220699. The reversal of 1444210220666 is 6660220124441.

It can be written as a sum of positive squares in 2 ways, for example, as 1444191045025 + 19175641 = 1201745^2 + 4379^2 .

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

It is a super-2 number, since 2×1444210220666² (a number of 25 digits) contains 22 as substring.

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, 69302801 + ... + 69323636.

Almost surely, 2^{1444210220666} is an apocalyptic number.

1444210220666 is a deficient number, since it is larger than the sum of its proper divisors (722521005274).

1444210220666 is a wasteful number, since it uses less digits than its factorization.

1444210220666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138631648.

The product of its (nonzero) digits is 110592, while the sum is 38.

The spelling of 1444210220666 in words is "one trillion, four hundred forty-four billion, two hundred ten million, two hundred twenty thousand, six hundred sixty-six".