65166125765 has 32 divisors (see below), whose sum is σ = 87148656000. Its totient is φ = 46447269120.

The previous prime is 65166125737. The next prime is 65166125807. The reversal of 65166125765 is 56752166156.

It is not a de Polignac number, because 65166125765 - 2¹⁶ = 65166060229 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9442286 + ... + 9449184.

It is an arithmetic number, because the mean of its divisors is an integer number (2723395500).

Almost surely, 2^65166125765 is an apocalyptic number.

65166125765 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

65166125765 is a deficient number, since it is larger than the sum of its proper divisors (21982530235).

65166125765 is a wasteful number, since it uses less digits than its factorization.

65166125765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11957.

The product of its digits is 2268000, while the sum is 50.

The spelling of 65166125765 in words is "sixty-five billion, one hundred sixty-six million, one hundred twenty-five thousand, seven hundred sixty-five".