66651254423332 has 24 divisors (see below), whose sum is σ = 118060445930112. Its totient is φ = 32921188092000.

The previous prime is 66651254423287. The next prime is 66651254423353. The reversal of 66651254423332 is 23332445215666.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 66651254423332.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186026844 + ... + 186384787.

It is an arithmetic number, because the mean of its divisors is an integer number (4919185247088).

Almost surely, 2^{66651254423332} is an apocalyptic number.

It is an amenable number.

66651254423332 is a deficient number, since it is larger than the sum of its proper divisors (51409191506780).

66651254423332 is a wasteful number, since it uses less digits than its factorization.

66651254423332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372412179 (or 372412177 counting only the distinct ones).

The product of its digits is 18662400, while the sum is 52.

Adding to 66651254423332 its reverse (23332445215666), we get a palindrome (89983699638998).

The spelling of 66651254423332 in words is "sixty-six trillion, six hundred fifty-one billion, two hundred fifty-four million, four hundred twenty-three thousand, three hundred thirty-two".