646166094 has 96 divisors (see below), whose sum is σ = 1562910720. Its totient is φ = 174436416.

The previous prime is 646166093. The next prime is 646166099. The reversal of 646166094 is 490661646.

646166094 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646166093) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2821572 + ... + 2821800.

It is an arithmetic number, because the mean of its divisors is an integer number (16280320).

Almost surely, 2^646166094 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 646166094, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (781455360).

646166094 is an abundant number, since it is smaller than the sum of its proper divisors (916744626).

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

646166094 is a wasteful number, since it uses less digits than its factorization.

646166094 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414 (or 391 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 646166094 is about 25419.7972847936. The cubic root of 646166094 is about 864.5326282244.

The spelling of 646166094 in words is "six hundred forty-six million, one hundred sixty-six thousand, ninety-four".