2077661 has 8 divisors (see below), whose sum is σ = 2151864. Its totient is φ = 2004480.

The previous prime is 2077639. The next prime is 2077667. The reversal of 2077661 is 1667702.

It can be written as a sum of positive squares in 4 ways, for example, as 649636 + 1428025 = 806^2 + 1195^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2077661 - 2¹⁴ = 2061277 is a prime.

It is a super-3 number, since 3×2077661³ = 26905763330851667343, which contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2077667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8501 + ... + 8741.

It is an arithmetic number, because the mean of its divisors is an integer number (268983).

2^2077661 is an apocalyptic number.

It is an amenable number.

2077661 is a deficient number, since it is larger than the sum of its proper divisors (74203).

2077661 is a wasteful number, since it uses less digits than its factorization.

2077661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 2077661 is about 1441.4093797391. The cubic root of 2077661 is about 127.6022197050.

The spelling of 2077661 in words is "two million, seventy-seven thousand, six hundred sixty-one".