3955649166 has 144 divisors (see below), whose sum is σ = 10357401600. Its totient is φ = 1086734880.

The previous prime is 3955649161. The next prime is 3955649207. The reversal of 3955649166 is 6619465593.

3955649166 is a `hidden beast` number, since 3 + 95 + 5 + 6 + 491 + 66 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3955649161) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 5440695 + ... + 5441421.

It is an arithmetic number, because the mean of its divisors is an integer number (71926400).

Almost surely, 2^3955649166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3955649166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5178700800).

3955649166 is an abundant number, since it is smaller than the sum of its proper divisors (6401752434).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3955649166 is a wasteful number, since it uses less digits than its factorization.

3955649166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979 (or 969 counting only the distinct ones).

The product of its digits is 5248800, while the sum is 54.

The square root of 3955649166 is about 62893.9517441860. The cubic root of 3955649166 is about 1581.5123539423.

The spelling of 3955649166 in words is "three billion, nine hundred fifty-five million, six hundred forty-nine thousand, one hundred sixty-six".