64966525279 has 4 divisors (see below), whose sum is σ = 64967496984. Its totient is φ = 64965553576.

The previous prime is 64966525237. The next prime is 64966525297. The reversal of 64966525279 is 97252566946.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97252566946 = 2 ⋅48626283473.

It is a cyclic number.

It is not a de Polignac number, because 64966525279 - 2²⁵ = 64932970847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64966525879) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 377512 + ... + 521965.

It is an arithmetic number, because the mean of its divisors is an integer number (16241874246).

Almost surely, 2^64966525279 is an apocalyptic number.

64966525279 is a deficient number, since it is larger than the sum of its proper divisors (971705).

64966525279 is an equidigital number, since it uses as much as digits as its factorization.

64966525279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971704.

The product of its digits is 48988800, while the sum is 61.

The spelling of 64966525279 in words is "sixty-four billion, nine hundred sixty-six million, five hundred twenty-five thousand, two hundred seventy-nine".