2666497 has 4 divisors (see below), whose sum is σ = 2670336. Its totient is φ = 2662660.

The previous prime is 2666491. The next prime is 2666507. The reversal of 2666497 is 7946662.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7946662 = 2 ⋅3973331.

It is a cyclic number.

It is not a de Polignac number, because 2666497 - 2¹¹ = 2664449 is a prime.

It is a super-2 number, since 2×2666497² = 14220412502018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2666491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 553 + ... + 2374.

It is an arithmetic number, because the mean of its divisors is an integer number (667584).

It is a Proth number, since it is equal to 651 ⋅ 2¹² + 1 and 651 < 2¹².

2^2666497 is an apocalyptic number.

It is an amenable number.

2666497 is a deficient number, since it is larger than the sum of its proper divisors (3839).

2666497 is an equidigital number, since it uses as much as digits as its factorization.

2666497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3838.

The product of its digits is 108864, while the sum is 40.

The square root of 2666497 is about 1632.9412114341. The cubic root of 2666497 is about 138.6693138003.

The spelling of 2666497 in words is "two million, six hundred sixty-six thousand, four hundred ninety-seven".