66331466036551 has 4 divisors (see below), whose sum is σ = 67130640326232. Its totient is φ = 65532291746872.

The previous prime is 66331466036519. The next prime is 66331466036569. The reversal of 66331466036551 is 15563066413366.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66331466036551 - 2⁵ = 66331466036519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66331466036492 and 66331466036501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66331466034551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 399587144716 + ... + 399587144881.

It is an arithmetic number, because the mean of its divisors is an integer number (16782660081558).

Almost surely, 2^{66331466036551} is an apocalyptic number.

66331466036551 is a deficient number, since it is larger than the sum of its proper divisors (799174289681).

66331466036551 is an equidigital number, since it uses as much as digits as its factorization.

66331466036551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799174289680.

The product of its (nonzero) digits is 20995200, while the sum is 55.

The spelling of 66331466036551 in words is "sixty-six trillion, three hundred thirty-one billion, four hundred sixty-six million, thirty-six thousand, five hundred fifty-one".