65840077 has 4 divisors (see below), whose sum is σ = 66276256. Its totient is φ = 65403900.

The previous prime is 65840069. The next prime is 65840083. The reversal of 65840077 is 77004856.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65840077 - 2³ = 65840069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65840977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217863 + ... + 218164.

It is an arithmetic number, because the mean of its divisors is an integer number (16569064).

Almost surely, 2^65840077 is an apocalyptic number.

It is an amenable number.

65840077 is a deficient number, since it is larger than the sum of its proper divisors (436179).

65840077 is a wasteful number, since it uses less digits than its factorization.

65840077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436178.

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 65840077 is about 8114.1898548161. The cubic root of 65840077 is about 403.7973303791.

The spelling of 65840077 in words is "sixty-five million, eight hundred forty thousand, seventy-seven".