2664551 has 2 divisors, whose sum is σ = 2664552. Its totient is φ = 2664550.

The previous prime is 2664547. The next prime is 2664553. The reversal of 2664551 is 1554662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2664551 - 2² = 2664547 is a prime.

Together with 2664553, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2664553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1332275 + 1332276.

It is an arithmetic number, because the mean of its divisors is an integer number (1332276).

2^2664551 is an apocalyptic number.

2664551 is a deficient number, since it is larger than the sum of its proper divisors (1).

2664551 is an equidigital number, since it uses as much as digits as its factorization.

2664551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7200, while the sum is 29.

The square root of 2664551 is about 1632.3452453449. The cubic root of 2664551 is about 138.6355721340.

The spelling of 2664551 in words is "two million, six hundred sixty-four thousand, five hundred fifty-one".