65887669 has 2 divisors, whose sum is σ = 65887670. Its totient is φ = 65887668.

The previous prime is 65887667. The next prime is 65887673. The reversal of 65887669 is 96678856.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65448100 + 439569 = 8090^2 + 663^2 .

It is a cyclic number.

It is not a de Polignac number, because 65887669 - 2¹ = 65887667 is a prime.

It is a super-2 number, since 2×65887669² = 8682369852507122, which contains 22 as substring.

Together with 65887667, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65887667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32943834 + 32943835.

It is an arithmetic number, because the mean of its divisors is an integer number (32943835).

Almost surely, 2^65887669 is an apocalyptic number.

It is an amenable number.

65887669 is a deficient number, since it is larger than the sum of its proper divisors (1).

65887669 is an equidigital number, since it uses as much as digits as its factorization.

65887669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4354560, while the sum is 55.

The square root of 65887669 is about 8117.1219653274. The cubic root of 65887669 is about 403.8946008910.

The spelling of 65887669 in words is "sixty-five million, eight hundred eighty-seven thousand, six hundred sixty-nine".