166444377 has 16 divisors (see below), whose sum is σ = 245514240. Its totient is φ = 99453200.

The previous prime is 166444373. The next prime is 166444423. The reversal of 166444377 is 773444661.

It is not a de Polignac number, because 166444377 - 2² = 166444373 is a prime.

It is a super-3 number, since 3×166444377³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (166444373) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33177 + ... + 37862.

It is an arithmetic number, because the mean of its divisors is an integer number (15344640).

Almost surely, 2^166444377 is an apocalyptic number.

It is an amenable number.

166444377 is a deficient number, since it is larger than the sum of its proper divisors (79069863).

166444377 is a wasteful number, since it uses less digits than its factorization.

166444377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71124.

The product of its digits is 338688, while the sum is 42.

The square root of 166444377 is about 12901.3323730536. The cubic root of 166444377 is about 550.0764378612.

The spelling of 166444377 in words is "one hundred sixty-six million, four hundred forty-four thousand, three hundred seventy-seven".