166515441 has 8 divisors (see below), whose sum is σ = 223304640. Its totient is φ = 110368272.

The previous prime is 166515413. The next prime is 166515443. The reversal of 166515441 is 144515661.

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

It is not a de Polignac number, because 166515441 - 2¹³ = 166507249 is a prime.

It is a super-3 number, since 3×166515441³ (a number of 26 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (166515443) 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, 159901 + ... + 160938.

It is an arithmetic number, because the mean of its divisors is an integer number (27913080).

Almost surely, 2^166515441 is an apocalyptic number.

It is an amenable number.

166515441 is a deficient number, since it is larger than the sum of its proper divisors (56789199).

166515441 is a wasteful number, since it uses less digits than its factorization.

166515441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321015.

The product of its digits is 14400, while the sum is 33.

The square root of 166515441 is about 12904.0862132892. The cubic root of 166515441 is about 550.1547123989.

The spelling of 166515441 in words is "one hundred sixty-six million, five hundred fifteen thousand, four hundred forty-one".