66231603323311 has 8 divisors (see below), whose sum is σ = 68911494792480. Its totient is φ = 63578114726112.

The previous prime is 66231603323267. The next prime is 66231603323359. The reversal of 66231603323311 is 11332330613266.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66231603323311 - 2²¹ = 66231601226159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66231603326311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6600712875 + ... + 6600722908.

It is an arithmetic number, because the mean of its divisors is an integer number (8613936849060).

Almost surely, 2^{66231603323311} is an apocalyptic number.

66231603323311 is a deficient number, since it is larger than the sum of its proper divisors (2679891469169).

66231603323311 is a wasteful number, since it uses less digits than its factorization.

66231603323311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13201435985.

The product of its (nonzero) digits is 209952, while the sum is 40.

Adding to 66231603323311 its reverse (11332330613266), we get a palindrome (77563933936577).

The spelling of 66231603323311 in words is "sixty-six trillion, two hundred thirty-one billion, six hundred three million, three hundred twenty-three thousand, three hundred eleven".