64466340637 has 4 divisors (see below), whose sum is σ = 64467127296. Its totient is φ = 64465553980.

The previous prime is 64466340613. The next prime is 64466340641. The reversal of 64466340637 is 73604366446.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64466340637 - 2³⁵ = 30106602269 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 (64466340667) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 253939 + ... + 439792.

It is an arithmetic number, because the mean of its divisors is an integer number (16116781824).

Almost surely, 2^64466340637 is an apocalyptic number.

It is an amenable number.

64466340637 is a deficient number, since it is larger than the sum of its proper divisors (786659).

64466340637 is an equidigital number, since it uses as much as digits as its factorization.

64466340637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786658.

The product of its (nonzero) digits is 5225472, while the sum is 49.

The spelling of 64466340637 in words is "sixty-four billion, four hundred sixty-six million, three hundred forty thousand, six hundred thirty-seven".