66170755451 has 2 divisors, whose sum is σ = 66170755452. Its totient is φ = 66170755450.

The previous prime is 66170755439. The next prime is 66170755499. The reversal of 66170755451 is 15455707166.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66170755451 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66170755396 and 66170755405.

It is not a weakly prime, because it can be changed into another prime (66170755151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33085377725 + 33085377726.

It is an arithmetic number, because the mean of its divisors is an integer number (33085377726).

Almost surely, 2^66170755451 is an apocalyptic number.

66170755451 is a deficient number, since it is larger than the sum of its proper divisors (1).

66170755451 is an equidigital number, since it uses as much as digits as its factorization.

66170755451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 882000, while the sum is 47.

The spelling of 66170755451 in words is "sixty-six billion, one hundred seventy million, seven hundred fifty-five thousand, four hundred fifty-one".