64664606987 has 8 divisors (see below), whose sum is σ = 68472762336. Its totient is φ = 60856935552.

The previous prime is 64664606971. The next prime is 64664607013. The reversal of 64664606987 is 78960646646.

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 64664606987 - 2⁴ = 64664606971 is a prime.

It is a super-3 number, since 3×64664606987³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64664606387) 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 7 ways as a sum of consecutive naturals, for example, 174833 + ... + 399869.

It is an arithmetic number, because the mean of its divisors is an integer number (8559095292).

Almost surely, 2^64664606987 is an apocalyptic number.

64664606987 is a deficient number, since it is larger than the sum of its proper divisors (3808155349).

64664606987 is a wasteful number, since it uses less digits than its factorization.

64664606987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241957.

The product of its (nonzero) digits is 62705664, while the sum is 62.

The spelling of 64664606987 in words is "sixty-four billion, six hundred sixty-four million, six hundred six thousand, nine hundred eighty-seven".