166020447 has 32 divisors (see below), whose sum is σ = 234823680. Its totient is φ = 104186880.

The previous prime is 166020409. The next prime is 166020473. The reversal of 166020447 is 744020661.

It is not a de Polignac number, because 166020447 - 2⁶ = 166020383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166020047) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 869122 + ... + 869312.

It is an arithmetic number, because the mean of its divisors is an integer number (7338240).

Almost surely, 2^166020447 is an apocalyptic number.

166020447 is a deficient number, since it is larger than the sum of its proper divisors (68803233).

166020447 is a wasteful number, since it uses less digits than its factorization.

166020447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 166020447 is about 12884.8921997819. The cubic root of 166020447 is about 549.6090301322.

The spelling of 166020447 in words is "one hundred sixty-six million, twenty thousand, four hundred forty-seven".