2021667066 has 32 divisors (see below), whose sum is σ = 4495582080. Its totient is φ = 673440768.

The previous prime is 2021667019. The next prime is 2021667091. The reversal of 2021667066 is 6607661202.

It is a self number, because there is not a number n which added to its sum of digits gives 2021667066.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75130 + ... + 98426.

It is an arithmetic number, because the mean of its divisors is an integer number (140486940).

Almost surely, 2^2021667066 is an apocalyptic number.

2021667066 is an abundant number, since it is smaller than the sum of its proper divisors (2473915014).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2021667066 is a wasteful number, since it uses less digits than its factorization.

2021667066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24915 (or 24909 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 2021667066 is about 44962.9521495197. The cubic root of 2021667066 is about 1264.4545166987.

The spelling of 2021667066 in words is "two billion, twenty-one million, six hundred sixty-seven thousand, sixty-six".