65878667 has 2 divisors, whose sum is σ = 65878668. Its totient is φ = 65878666.

The previous prime is 65878639. The next prime is 65878669. The reversal of 65878667 is 76687856.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65878667 - 2²⁰ = 64830091 is a prime.

Together with 65878669, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65878669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32939333 + 32939334.

It is an arithmetic number, because the mean of its divisors is an integer number (32939334).

Almost surely, 2^65878667 is an apocalyptic number.

65878667 is a deficient number, since it is larger than the sum of its proper divisors (1).

65878667 is an equidigital number, since it uses as much as digits as its factorization.

65878667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3386880, while the sum is 53.

The square root of 65878667 is about 8116.5674395030. The cubic root of 65878667 is about 403.8762058213.

The spelling of 65878667 in words is "sixty-five million, eight hundred seventy-eight thousand, six hundred sixty-seven".