166001533 has 4 divisors (see below), whose sum is σ = 166027680. Its totient is φ = 165975388.

The previous prime is 166001519. The next prime is 166001599. The reversal of 166001533 is 335100661.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 166001533 - 2⁹ = 166001021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166001498 and 166001507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166001503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3216 + ... + 18502.

It is an arithmetic number, because the mean of its divisors is an integer number (41506920).

Almost surely, 2^166001533 is an apocalyptic number.

It is an amenable number.

166001533 is a deficient number, since it is larger than the sum of its proper divisors (26147).

166001533 is a wasteful number, since it uses less digits than its factorization.

166001533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26146.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 166001533 is about 12884.1582185256. The cubic root of 166001533 is about 549.5881578036.

The spelling of 166001533 in words is "one hundred sixty-six million, one thousand, five hundred thirty-three".