64666788038 has 8 divisors (see below), whose sum is σ = 97008697632. Its totient is φ = 32330555496.

The previous prime is 64666788037. The next prime is 64666788071. The reversal of 64666788038 is 83088766646.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64666788037) 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, 1390670 + ... + 1436417.

It is an arithmetic number, because the mean of its divisors is an integer number (12126087204).

Almost surely, 2^64666788038 is an apocalyptic number.

64666788038 is a deficient number, since it is larger than the sum of its proper divisors (32341909594).

64666788038 is a wasteful number, since it uses less digits than its factorization.

64666788038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2838526.

The product of its (nonzero) digits is 55738368, while the sum is 62.

The spelling of 64666788038 in words is "sixty-four billion, six hundred sixty-six million, seven hundred eighty-eight thousand, thirty-eight".