166020133 has 4 divisors (see below), whose sum is σ = 166288960. Its totient is φ = 165751308.

The previous prime is 166020103. The next prime is 166020161. The reversal of 166020133 is 331020661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166020133 is a prime.

It is a super-2 number, since 2×166020133² = 55125369122675378, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166020103) 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, 133485 + ... + 134722.

It is an arithmetic number, because the mean of its divisors is an integer number (41572240).

Almost surely, 2^166020133 is an apocalyptic number.

It is an amenable number.

166020133 is a deficient number, since it is larger than the sum of its proper divisors (268827).

166020133 is an equidigital number, since it uses as much as digits as its factorization.

166020133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268826.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 166020133 is about 12884.8800149633. The cubic root of 166020133 is about 549.6086836340.

Adding to 166020133 its reverse (331020661), we get a palindrome (497040794).

The spelling of 166020133 in words is "one hundred sixty-six million, twenty thousand, one hundred thirty-three".