1020012666 has 16 divisors (see below), whose sum is σ = 2078517024. Its totient is φ = 333588944.

The previous prime is 1020012661. The next prime is 1020012667. The reversal of 1020012666 is 6662100201.

1020012666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (1020012661) 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, 1603476 + ... + 1604111.

It is an arithmetic number, because the mean of its divisors is an integer number (129907314).

Almost surely, 2^1020012666 is an apocalyptic number.

1020012666 is an abundant number, since it is smaller than the sum of its proper divisors (1058504358).

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

1020012666 is a wasteful number, since it uses less digits than its factorization.

1020012666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3207645.

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

The square root of 1020012666 is about 31937.6371386488. The cubic root of 1020012666 is about 1006.6268761714.

Adding to 1020012666 its reverse (6662100201), we get a palindrome (7682112867).

The spelling of 1020012666 in words is "one billion, twenty million, twelve thousand, six hundred sixty-six".