2606551 has 2 divisors, whose sum is σ = 2606552. Its totient is φ = 2606550.

The previous prime is 2606519. The next prime is 2606579. The reversal of 2606551 is 1556062.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2606551 - 2⁵ = 2606519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2606251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1303275 + 1303276.

It is an arithmetic number, because the mean of its divisors is an integer number (1303276).

2^2606551 is an apocalyptic number.

2606551 is a deficient number, since it is larger than the sum of its proper divisors (1).

2606551 is an equidigital number, since it uses as much as digits as its factorization.

2606551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 2606551 is about 1614.4816505616. The cubic root of 2606551 is about 137.6222780035.

The spelling of 2606551 in words is "two million, six hundred six thousand, five hundred fifty-one".