64525565766 has 16 divisors (see below), whose sum is σ = 131796900864. Its totient is φ = 21050893704.

The previous prime is 64525565743. The next prime is 64525565803. The reversal of 64525565766 is 66756552546.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114406750 + ... + 114407313.

It is an arithmetic number, because the mean of its divisors is an integer number (8237306304).

Almost surely, 2^64525565766 is an apocalyptic number.

64525565766 is an abundant number, since it is smaller than the sum of its proper divisors (67271335098).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64525565766 is a wasteful number, since it uses less digits than its factorization.

64525565766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228814115.

The product of its digits is 45360000, while the sum is 57.

The spelling of 64525565766 in words is "sixty-four billion, five hundred twenty-five million, five hundred sixty-five thousand, seven hundred sixty-six".