1020666012 has 12 divisors (see below), whose sum is σ = 2381554056. Its totient is φ = 340222000.

The previous prime is 1020666011. The next prime is 1020666067. The reversal of 1020666012 is 2106660201.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020666011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42527739 + ... + 42527762.

It is an arithmetic number, because the mean of its divisors is an integer number (198462838).

Almost surely, 2^1020666012 is an apocalyptic number.

1020666012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1020666012 is an abundant number, since it is smaller than the sum of its proper divisors (1360888044).

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

1020666012 is a wasteful number, since it uses less digits than its factorization.

1020666012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85055508 (or 85055506 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 1020666012 is about 31947.8639661559. The cubic root of 1020666012 is about 1006.8417543113.

The spelling of 1020666012 in words is "one billion, twenty million, six hundred sixty-six thousand, twelve".