1445222666 has 16 divisors (see below), whose sum is σ = 2369399040. Its totient is φ = 658165440.

The previous prime is 1445222651. The next prime is 1445222699. The reversal of 1445222666 is 6662225441.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 684536 + ... + 686643.

It is an arithmetic number, because the mean of its divisors is an integer number (148087440).

Almost surely, 2^1445222666 is an apocalyptic number.

1445222666 is a deficient number, since it is larger than the sum of its proper divisors (924176374).

1445222666 is a wasteful number, since it uses less digits than its factorization.

1445222666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1371229.

The product of its digits is 138240, while the sum is 38.

The square root of 1445222666 is about 38016.0843065143. The cubic root of 1445222666 is about 1130.6067866480.

The spelling of 1445222666 in words is "one billion, four hundred forty-five million, two hundred twenty-two thousand, six hundred sixty-six".