65878440111 has 12 divisors (see below), whose sum is σ = 103808451240. Its totient is φ = 39926327280.

The previous prime is 65878440107. The next prime is 65878440119. The reversal of 65878440111 is 11104487856.

It is not a de Polignac number, because 65878440111 - 2² = 65878440107 is a prime.

It is a super-2 number, since 2×65878440111² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65878440119) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 332719296 + ... + 332719493.

It is an arithmetic number, because the mean of its divisors is an integer number (8650704270).

Almost surely, 2^65878440111 is an apocalyptic number.

65878440111 is a deficient number, since it is larger than the sum of its proper divisors (37930011129).

65878440111 is a wasteful number, since it uses less digits than its factorization.

65878440111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665438806 (or 665438803 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 45.

The spelling of 65878440111 in words is "sixty-five billion, eight hundred seventy-eight million, four hundred forty thousand, one hundred eleven".