1021000166 has 8 divisors (see below), whose sum is σ = 1545551040. Its totient is φ = 505816488.

The previous prime is 1021000157. The next prime is 1021000217. The reversal of 1021000166 is 6610001201.

It is a happy number.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2341526 + ... + 2341961.

It is an arithmetic number, because the mean of its divisors is an integer number (193193880).

Almost surely, 2^1021000166 is an apocalyptic number.

1021000166 is a deficient number, since it is larger than the sum of its proper divisors (524550874).

1021000166 is a wasteful number, since it uses less digits than its factorization.

1021000166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4683598.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1021000166 is about 31953.0932148986. The cubic root of 1021000166 is about 1006.9516183566.

Adding to 1021000166 its reverse (6610001201), we get a palindrome (7631001367).

The spelling of 1021000166 in words is "one billion, twenty-one million, one hundred sixty-six", and thus it is an aban number.