2566527994 has 4 divisors (see below), whose sum is σ = 3849791994. Its totient is φ = 1283263996.

The previous prime is 2566527989. The next prime is 2566528039. The reversal of 2566527994 is 4997256652.

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

It can be written as a sum of positive squares in only one way, i.e., 2545707025 + 20820969 = 50455^2 + 4563^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 641631997 + ... + 641632000.

Almost surely, 2^2566527994 is an apocalyptic number.

2566527994 is a deficient number, since it is larger than the sum of its proper divisors (1283264000).

2566527994 is a wasteful number, since it uses less digits than its factorization.

2566527994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1283263999.

The product of its digits is 8164800, while the sum is 55.

The square root of 2566527994 is about 50660.9118946748. The cubic root of 2566527994 is about 1369.1425529499.

The spelling of 2566527994 in words is "two billion, five hundred sixty-six million, five hundred twenty-seven thousand, nine hundred ninety-four".