166001539 has 8 divisors (see below), whose sum is σ = 187337520. Its totient is φ = 145706400.

The previous prime is 166001519. The next prime is 166001599. The reversal of 166001539 is 935100661.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166001539 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166001539.

It is not an unprimeable number, because it can be changed into a prime (166001519) 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, 259872 + ... + 260509.

It is an arithmetic number, because the mean of its divisors is an integer number (23417190).

Almost surely, 2^166001539 is an apocalyptic number.

166001539 is a deficient number, since it is larger than the sum of its proper divisors (21335981).

166001539 is a wasteful number, since it uses less digits than its factorization.

166001539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520421.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 166001539 is about 12884.1584513697. The cubic root of 166001539 is about 549.5881644251.

The spelling of 166001539 in words is "one hundred sixty-six million, one thousand, five hundred thirty-nine".