7245666665426 has 48 divisors (see below), whose sum is σ = 12700197753984. Its totient is φ = 3091246383456.

The previous prime is 7245666665399. The next prime is 7245666665429. The reversal of 7245666665426 is 6245666665427.

It is a super-2 number, since 2×7245666665426² (a number of 27 digits) contains 22 as substring.

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 23 ways as a sum of consecutive naturals, for example, 27965591 + ... + 28223493.

It is an arithmetic number, because the mean of its divisors is an integer number (264587453208).

Almost surely, 2^{7245666665426} is an apocalyptic number.

7245666665426 is a deficient number, since it is larger than the sum of its proper divisors (5454531088558).

7245666665426 is a wasteful number, since it uses less digits than its factorization.

7245666665426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259215 (or 259208 counting only the distinct ones).

The product of its digits is 522547200, while the sum is 65.

Subtracting from 7245666665426 its reverse (6245666665427), we obtain a palindrome (999999999999).

The spelling of 7245666665426 in words is "seven trillion, two hundred forty-five billion, six hundred sixty-six million, six hundred sixty-five thousand, four hundred twenty-six".