4166640 has 100 divisors (see below), whose sum is σ = 14493864. Its totient is φ = 1109376.

The previous prime is 4166629. The next prime is 4166641. The reversal of 4166640 is 466614.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4166641) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6159 + ... + 6801.

Almost surely, 2^4166640 is an apocalyptic number.

4166640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4166640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7246932).

4166640 is an abundant number, since it is smaller than the sum of its proper divisors (10327224).

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

4166640 is a wasteful number, since it uses less digits than its factorization.

4166640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668 (or 653 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 4166640 is about 2041.2349203362. The cubic root of 4166640 is about 160.9145541484.

It can be divided in two parts, 416 and 6640, that added together give a square (7056 = 84²).

The spelling of 4166640 in words is "four million, one hundred sixty-six thousand, six hundred forty".