7245666665427 has 16 divisors (see below), whose sum is σ = 9866753459712. Its totient is φ = 4727518693920.

The previous prime is 7245666665399. The next prime is 7245666665429.

It is a happy number.

7245666665427 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 7245666665427 - 2²⁰ = 7245665616851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7245666665429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3721852 + ... + 5323862.

It is an arithmetic number, because the mean of its divisors is an integer number (616672091232).

Almost surely, 2^{7245666665427} is an apocalyptic number.

7245666665427 is a deficient number, since it is larger than the sum of its proper divisors (2621086794285).

7245666665427 is a wasteful number, since it uses less digits than its factorization.

7245666665427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1634138.

The product of its digits is 609638400, while the sum is 66.

The spelling of 7245666665427 in words is "seven trillion, two hundred forty-five billion, six hundred sixty-six million, six hundred sixty-five thousand, four hundred twenty-seven".