2566669 has 10 divisors (see below), whose sum is σ = 2997070. Its totient is φ = 2197944.

The previous prime is 2566667. The next prime is 2566673. The reversal of 2566669 is 9666652.

It can be written as a sum of positive squares in only one way, i.e., 2160900 + 405769 = 1470^2 + 637^2 .

It is not a de Polignac number, because 2566669 - 2¹ = 2566667 is a prime.

It is a super-2 number, since 2×2566669² = 13175579511122, which contains 22 as substring.

It is a Duffinian number.

2566669 is a lucky number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2566661) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1867 + ... + 2935.

It is an arithmetic number, because the mean of its divisors is an integer number (299707).

2^2566669 is an apocalyptic number.

It is an amenable number.

2566669 is a deficient number, since it is larger than the sum of its proper divisors (430401).

2566669 is an frugal number, since it uses more digits than its factorization.

2566669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1097 (or 1076 counting only the distinct ones).

The product of its digits is 116640, while the sum is 40.

The square root of 2566669 is about 1602.0827069786. The cubic root of 2566669 is about 136.9167626224.

The spelling of 2566669 in words is "two million, five hundred sixty-six thousand, six hundred sixty-nine".