1020023666 has 16 divisors (see below), whose sum is σ = 1568390040. Its totient is φ = 497243520.

The previous prime is 1020023663. The next prime is 1020023687. The reversal of 1020023666 is 6663200201.

It can be written as a sum of positive squares in 4 ways, for example, as 311346025 + 708677641 = 17645^2 + 26621^2 .

It is not an unprimeable number, because it can be changed into a prime (1020023663) 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, 160640 + ... + 166868.

Almost surely, 2^1020023666 is an apocalyptic number.

1020023666 is a deficient number, since it is larger than the sum of its proper divisors (548366374).

1020023666 is a wasteful number, since it uses less digits than its factorization.

1020023666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8269.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 1020023666 is about 31937.8093487954. The cubic root of 1020023666 is about 1006.6304947068.

Adding to 1020023666 its reverse (6663200201), we get a palindrome (7683223867).

The spelling of 1020023666 in words is "one billion, twenty million, twenty-three thousand, six hundred sixty-six".