2661771 has 8 divisors (see below), whose sum is σ = 4056064. Its totient is φ = 1521000.

The previous prime is 2661739. The next prime is 2661779. The reversal of 2661771 is 1771662.

It is a happy number.

2661771 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2661771 - 2⁵ = 2661739 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2661779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63355 + ... + 63396.

It is an arithmetic number, because the mean of its divisors is an integer number (507008).

2^2661771 is an apocalyptic number.

2661771 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2661771 is a deficient number, since it is larger than the sum of its proper divisors (1394293).

2661771 is a wasteful number, since it uses less digits than its factorization.

2661771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126761.

The product of its digits is 3528, while the sum is 30.

The square root of 2661771 is about 1631.4934875751. The cubic root of 2661771 is about 138.5873412433.

The spelling of 2661771 in words is "two million, six hundred sixty-one thousand, seven hundred seventy-one".