1006646166021 has 8 divisors (see below), whose sum is σ = 1412836724320. Its totient is φ = 635776525872.

The previous prime is 1006646166017. The next prime is 1006646166041. The reversal of 1006646166021 is 1206616466001.

It is a happy number.

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

It is not a de Polignac number, because 1006646166021 - 2² = 1006646166017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1006646166041) 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, 8830229470 + ... + 8830229583.

It is an arithmetic number, because the mean of its divisors is an integer number (176604590540).

Almost surely, 2^{1006646166021} is an apocalyptic number.

It is an amenable number.

1006646166021 is a deficient number, since it is larger than the sum of its proper divisors (406190558299).

1006646166021 is a wasteful number, since it uses less digits than its factorization.

1006646166021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17660459075.

The product of its (nonzero) digits is 62208, while the sum is 39.

The spelling of 1006646166021 in words is "one trillion, six billion, six hundred forty-six million, one hundred sixty-six thousand, twenty-one".