1020166066 has 4 divisors (see below), whose sum is σ = 1530249102. Its totient is φ = 510083032.

The previous prime is 1020166051. The next prime is 1020166097. The reversal of 1020166066 is 6606610201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6606610201 = 113 ⋅58465577.

It can be written as a sum of positive squares in only one way, i.e., 1012576041 + 7590025 = 31821^2 + 2755^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255041515 + ... + 255041518.

Almost surely, 2^1020166066 is an apocalyptic number.

1020166066 is a deficient number, since it is larger than the sum of its proper divisors (510083036).

1020166066 is an equidigital number, since it uses as much as digits as its factorization.

1020166066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510083035.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 1020166066 is about 31940.0386036085. The cubic root of 1020166066 is about 1006.6773359443.

Adding to 1020166066 its reverse (6606610201), we get a palindrome (7626776267).

It can be divided in two parts, 10201 and 66066, that added together give a palindrome (76267).

The spelling of 1020166066 in words is "one billion, twenty million, one hundred sixty-six thousand, sixty-six".