66038620989 has 16 divisors (see below), whose sum is σ = 96291051840. Its totient is φ = 39925541760.

The previous prime is 66038620987. The next prime is 66038620997. The reversal of 66038620989 is 98902683066.

It is not a de Polignac number, because 66038620989 - 2¹ = 66038620987 is a prime.

It is a super-2 number, since 2×66038620989² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66038620981) 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 15 ways as a sum of consecutive naturals, for example, 2432922 + ... + 2459915.

It is an arithmetic number, because the mean of its divisors is an integer number (6018190740).

Almost surely, 2^66038620989 is an apocalyptic number.

It is an amenable number.

66038620989 is a deficient number, since it is larger than the sum of its proper divisors (30252430851).

66038620989 is a wasteful number, since it uses less digits than its factorization.

66038620989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4893260.

The product of its (nonzero) digits is 6718464, while the sum is 57.

The spelling of 66038620989 in words is "sixty-six billion, thirty-eight million, six hundred twenty thousand, nine hundred eighty-nine".