65671440511 has 2 divisors, whose sum is σ = 65671440512. Its totient is φ = 65671440510.

The previous prime is 65671440479. The next prime is 65671440607. The reversal of 65671440511 is 11504417656.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65671440511 - 2⁵ = 65671440479 is a prime.

It is a super-2 number, since 2×65671440511² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65671440311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32835720255 + 32835720256.

It is an arithmetic number, because the mean of its divisors is an integer number (32835720256).

Almost surely, 2^65671440511 is an apocalyptic number.

65671440511 is a deficient number, since it is larger than the sum of its proper divisors (1).

65671440511 is an equidigital number, since it uses as much as digits as its factorization.

65671440511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100800, while the sum is 40.

It can be divided in two parts, 656714 and 40511, that added together give a square (697225 = 835²).

The spelling of 65671440511 in words is "sixty-five billion, six hundred seventy-one million, four hundred forty thousand, five hundred eleven".