1000066664 has 8 divisors (see below), whose sum is σ = 1875125010. Its totient is φ = 500033328.

The previous prime is 1000066663. The next prime is 1000066679. The reversal of 1000066664 is 4666600001.

It can be written as a sum of positive squares in only one way, i.e., 702780100 + 297286564 = 26510^2 + 17242^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1000066663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62504159 + ... + 62504174.

Almost surely, 2^1000066664 is an apocalyptic number.

It is an amenable number.

1000066664 is a deficient number, since it is larger than the sum of its proper divisors (875058346).

1000066664 is a wasteful number, since it uses less digits than its factorization.

1000066664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125008339 (or 125008335 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 1000066664 is about 31623.8306345073. The cubic root of 1000066664 is about 1000.0222208396.

Adding to 1000066664 its reverse (4666600001), we get a palindrome (5666666665).

The spelling of 1000066664 in words is "one billion, sixty-six thousand, six hundred sixty-four".