64664606739 has 8 divisors (see below), whose sum is σ = 87433834752. Its totient is φ = 42502558280.

The previous prime is 64664606729. The next prime is 64664606753. The reversal of 64664606739 is 93760646646.

64664606739 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64664606739 - 2⁸ = 64664606483 is a prime.

It is a super-2 number, since 2×64664606739² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64664606719) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151794639 + ... + 151795064.

It is an arithmetic number, because the mean of its divisors is an integer number (10929229344).

Almost surely, 2^64664606739 is an apocalyptic number.

64664606739 is a deficient number, since it is larger than the sum of its proper divisors (22769228013).

64664606739 is a wasteful number, since it uses less digits than its factorization.

64664606739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303589777.

The product of its (nonzero) digits is 23514624, while the sum is 57.

The spelling of 64664606739 in words is "sixty-four billion, six hundred sixty-four million, six hundred six thousand, seven hundred thirty-nine".