7425311666 has 4 divisors (see below), whose sum is σ = 11137967502. Its totient is φ = 3712655832.

The previous prime is 7425311659. The next prime is 7425311669. The reversal of 7425311666 is 6661135247.

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., 7422684025 + 2627641 = 86155^2 + 1621^2 .

It is not an unprimeable number, because it can be changed into a prime (7425311669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1856327915 + ... + 1856327918.

Almost surely, 2^7425311666 is an apocalyptic number.

7425311666 is a deficient number, since it is larger than the sum of its proper divisors (3712655836).

7425311666 is a wasteful number, since it uses less digits than its factorization.

7425311666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3712655835.

The product of its digits is 181440, while the sum is 41.

The square root of 7425311666 is about 86170.2481486505. The cubic root of 7425311666 is about 1950.9144662005.

The spelling of 7425311666 in words is "seven billion, four hundred twenty-five million, three hundred eleven thousand, six hundred sixty-six".