1066221150997 has 8 divisors (see below), whose sum is σ = 1072371636000. Its totient is φ = 1060072821264.

The previous prime is 1066221150913. The next prime is 1066221151033. The reversal of 1066221150997 is 7990511226601.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1066221150997 - 2²³ = 1066212762389 is a prime.

It is a super-2 number, since 2×1066221150997² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1066221150997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066221150497) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 458754 + ... + 1530652.

It is an arithmetic number, because the mean of its divisors is an integer number (134046454500).

Almost surely, 2^{1066221150997} is an apocalyptic number.

It is an amenable number.

1066221150997 is a deficient number, since it is larger than the sum of its proper divisors (6150485003).

1066221150997 is a wasteful number, since it uses less digits than its factorization.

1066221150997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077635.

The product of its (nonzero) digits is 408240, while the sum is 49.

The spelling of 1066221150997 in words is "one trillion, sixty-six billion, two hundred twenty-one million, one hundred fifty thousand, nine hundred ninety-seven".