2640066 has 64 divisors (see below), whose sum is σ = 6604416. Its totient is φ = 691200.

The previous prime is 2640059. The next prime is 2640067. The reversal of 2640066 is 6600462.

It is not an unprimeable number, because it can be changed into a prime (2640067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14496 + ... + 14676.

It is an arithmetic number, because the mean of its divisors is an integer number (103194).

2^2640066 is an apocalyptic number.

2640066 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 2640066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3302208).

2640066 is an abundant number, since it is smaller than the sum of its proper divisors (3964350).

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

2640066 is a wasteful number, since it uses less digits than its factorization.

2640066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 2640066 is about 1624.8279908963. The cubic root of 2640066 is about 138.2096163278.

It can be divided in two parts, 26400 and 66, that multiplied together give a square (1742400 = 1320²).

The spelling of 2640066 in words is "two million, six hundred forty thousand, sixty-six".