47665766669 has 2 divisors, whose sum is σ = 47665766670. Its totient is φ = 47665766668.

The previous prime is 47665766647. The next prime is 47665766689. The reversal of 47665766669 is 96666756674.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46671121225 + 994645444 = 216035^2 + 31538^2 .

It is a cyclic number.

It is not a de Polignac number, because 47665766669 - 2⁸ = 47665766413 is a prime.

It is a super-2 number, since 2×47665766669² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 47665766599 and 47665766608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47665766639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23832883334 + 23832883335.

It is an arithmetic number, because the mean of its divisors is an integer number (23832883335).

Almost surely, 2^47665766669 is an apocalyptic number.

It is an amenable number.

47665766669 is a deficient number, since it is larger than the sum of its proper divisors (1).

47665766669 is an equidigital number, since it uses as much as digits as its factorization.

47665766669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 411505920, while the sum is 68.

The spelling of 47665766669 in words is "forty-seven billion, six hundred sixty-five million, seven hundred sixty-six thousand, six hundred sixty-nine".