1071020666 has 16 divisors (see below), whose sum is σ = 1613220000. Its totient is φ = 533286288.

The previous prime is 1071020659. The next prime is 1071020669. The reversal of 1071020666 is 6660201701.

It is a super-2 number, since 2×1071020666² = 2294170533998167112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1071020669) 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, 640880 + ... + 642548.

It is an arithmetic number, because the mean of its divisors is an integer number (100826250).

Almost surely, 2^1071020666 is an apocalyptic number.

1071020666 is a deficient number, since it is larger than the sum of its proper divisors (542199334).

1071020666 is a wasteful number, since it uses less digits than its factorization.

1071020666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2813.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 1071020666 is about 32726.4520839030. The cubic root of 1071020666 is about 1023.1342353936.

The spelling of 1071020666 in words is "one billion, seventy-one million, twenty thousand, six hundred sixty-six".