2651342566 has 4 divisors (see below), whose sum is σ = 3977013852. Its totient is φ = 1325671282.

The previous prime is 2651342539. The next prime is 2651342579. The reversal of 2651342566 is 6652431562.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 662835640 + ... + 662835643.

It is an arithmetic number, because the mean of its divisors is an integer number (994253463).

Almost surely, 2^2651342566 is an apocalyptic number.

2651342566 is a deficient number, since it is larger than the sum of its proper divisors (1325671286).

2651342566 is a wasteful number, since it uses less digits than its factorization.

2651342566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325671285.

The product of its digits is 259200, while the sum is 40.

The square root of 2651342566 is about 51491.1892074751. The cubic root of 2651342566 is about 1384.0611597568.

The spelling of 2651342566 in words is "two billion, six hundred fifty-one million, three hundred forty-two thousand, five hundred sixty-six".