166531026 has 8 divisors (see below), whose sum is σ = 333062064. Its totient is φ = 55510340.

The previous prime is 166531019. The next prime is 166531033. The reversal of 166531026 is 620135661.

It is an interprime number because it is at equal distance from previous prime (166531019) and next prime (166531033).

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

166531026 is an admirable number.

It is a super-2 number, since 2×166531026² = 55465165241225352, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 166530984 and 166531002.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13877580 + ... + 13877591.

It is an arithmetic number, because the mean of its divisors is an integer number (41632758).

Almost surely, 2^166531026 is an apocalyptic number.

166531026 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166531026 is a wasteful number, since it uses less digits than its factorization.

166531026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27755176.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 166531026 is about 12904.6900776423. The cubic root of 166531026 is about 550.1718757596.

Adding to 166531026 its reverse (620135661), we get a palindrome (786666687).

The spelling of 166531026 in words is "one hundred sixty-six million, five hundred thirty-one thousand, twenty-six".