505526666 has 8 divisors (see below), whose sum is σ = 784438020. Its totient is φ = 244047328.

The previous prime is 505526663. The next prime is 505526669. The reversal of 505526666 is 666625505.

It is an interprime number because it is at equal distance from previous prime (505526663) and next prime (505526669).

It can be written as a sum of positive squares in 2 ways, for example, as 452455441 + 53071225 = 21271^2 + 7285^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (505526663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4357931 + ... + 4358046.

Almost surely, 2^505526666 is an apocalyptic number.

505526666 is a deficient number, since it is larger than the sum of its proper divisors (278911354).

505526666 is a wasteful number, since it uses less digits than its factorization.

505526666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8716008.

The product of its (nonzero) digits is 324000, while the sum is 41.

The square root of 505526666 is about 22483.9201653093. The cubic root of 505526666 is about 796.6141622192.

The spelling of 505526666 in words is "five hundred five million, five hundred twenty-six thousand, six hundred sixty-six".