527166809 has 8 divisors (see below), whose sum is σ = 572743752. Its totient is φ = 482307840.

The previous prime is 527166797. The next prime is 527166817. The reversal of 527166809 is 908661725.

It can be written as a sum of positive squares in 4 ways, for example, as 38093584 + 489073225 = 6172^2 + 22115^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 527166809 - 2¹⁶ = 527101273 is a prime.

It is a super-2 number, since 2×527166809² = 555809689022484962, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 527166809.

It is not an unprimeable number, because it can be changed into a prime (527166839) 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, 177962 + ... + 180899.

It is an arithmetic number, because the mean of its divisors is an integer number (71592969).

Almost surely, 2^527166809 is an apocalyptic number.

It is an amenable number.

527166809 is a deficient number, since it is larger than the sum of its proper divisors (45576943).

527166809 is a wasteful number, since it uses less digits than its factorization.

527166809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358987.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 527166809 is about 22960.1134361309. The cubic root of 527166809 is about 807.8226382796.

The spelling of 527166809 in words is "five hundred twenty-seven million, one hundred sixty-six thousand, eight hundred nine".