65611651069 has 2 divisors, whose sum is σ = 65611651070. Its totient is φ = 65611651068.

The previous prime is 65611651051. The next prime is 65611651073. The reversal of 65611651069 is 96015611656.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63926548569 + 1685102500 = 252837^2 + 41050^2 .

It is a cyclic number.

It is not a de Polignac number, because 65611651069 - 2⁷ = 65611650941 is a prime.

It is a super-2 number, since 2×65611651069² (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 (65611651009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32805825534 + 32805825535.

It is an arithmetic number, because the mean of its divisors is an integer number (32805825535).

Almost surely, 2^65611651069 is an apocalyptic number.

It is an amenable number.

65611651069 is a deficient number, since it is larger than the sum of its proper divisors (1).

65611651069 is an equidigital number, since it uses as much as digits as its factorization.

65611651069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 291600, while the sum is 46.

The spelling of 65611651069 in words is "sixty-five billion, six hundred eleven million, six hundred fifty-one thousand, sixty-nine".