1463445221666 has 4 divisors (see below), whose sum is σ = 2195167832502. Its totient is φ = 731722610832.

The previous prime is 1463445221611. The next prime is 1463445221681. The reversal of 1463445221666 is 6661225443641.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1431217432225 + 32227789441 = 1196335^2 + 179521^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 365861305415 + ... + 365861305418.

Almost surely, 2^{1463445221666} is an apocalyptic number.

1463445221666 is a deficient number, since it is larger than the sum of its proper divisors (731722610836).

1463445221666 is an equidigital number, since it uses as much as digits as its factorization.

1463445221666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731722610835.

The product of its digits is 4976640, while the sum is 50.

The spelling of 1463445221666 in words is "one trillion, four hundred sixty-three billion, four hundred forty-five million, two hundred twenty-one thousand, six hundred sixty-six".