66050973517 has 2 divisors, whose sum is σ = 66050973518. Its totient is φ = 66050973516.

The previous prime is 66050973481. The next prime is 66050973523. The reversal of 66050973517 is 71537905066.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51617113636 + 14433859881 = 227194^2 + 120141^2 .

It is a cyclic number.

It is not a de Polignac number, because 66050973517 - 2¹⁵ = 66050940749 is a prime.

It is a super-2 number, since 2×66050973517² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66050973587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33025486758 + 33025486759.

It is an arithmetic number, because the mean of its divisors is an integer number (33025486759).

Almost surely, 2^66050973517 is an apocalyptic number.

It is an amenable number.

66050973517 is a deficient number, since it is larger than the sum of its proper divisors (1).

66050973517 is an equidigital number, since it uses as much as digits as its factorization.

66050973517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1190700, while the sum is 49.

The spelling of 66050973517 in words is "sixty-six billion, fifty million, nine hundred seventy-three thousand, five hundred seventeen".