166117445 has 32 divisors (see below), whose sum is σ = 222856704. Its totient is φ = 118080000.

The previous prime is 166117433. The next prime is 166117459. The reversal of 166117445 is 544711661.

It is not a de Polignac number, because 166117445 - 2⁴ = 166117429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 220820 + ... + 221570.

It is an arithmetic number, because the mean of its divisors is an integer number (6964272).

Almost surely, 2^166117445 is an apocalyptic number.

It is an amenable number.

166117445 is a deficient number, since it is larger than the sum of its proper divisors (56739259).

166117445 is a wasteful number, since it uses less digits than its factorization.

166117445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 893.

The product of its digits is 20160, while the sum is 35.

The square root of 166117445 is about 12888.6556707827. The cubic root of 166117445 is about 549.7160462632.

The spelling of 166117445 in words is "one hundred sixty-six million, one hundred seventeen thousand, four hundred forty-five".