166526531 has 4 divisors (see below), whose sum is σ = 166556832. Its totient is φ = 166496232.

The previous prime is 166526527. The next prime is 166526533. The reversal of 166526531 is 135625661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 166526531 - 2² = 166526527 is a prime.

It is a super-2 number, since 2×166526531² = 55462171053787922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166526491 and 166526500.

It is not an unprimeable number, because it can be changed into a prime (166526533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4331 + ... + 18756.

It is an arithmetic number, because the mean of its divisors is an integer number (41639208).

Almost surely, 2^166526531 is an apocalyptic number.

166526531 is a deficient number, since it is larger than the sum of its proper divisors (30301).

166526531 is an equidigital number, since it uses as much as digits as its factorization.

166526531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30300.

The product of its digits is 32400, while the sum is 35.

The square root of 166526531 is about 12904.5159149811. The cubic root of 166526531 is about 550.1669256413.

The spelling of 166526531 in words is "one hundred sixty-six million, five hundred twenty-six thousand, five hundred thirty-one".