66388063315 has 64 divisors (see below), whose sum is σ = 98537472000. Its totient is φ = 42772305408.

The previous prime is 66388063283. The next prime is 66388063331. The reversal of 66388063315 is 51336088366.

It is not a de Polignac number, because 66388063315 - 2⁵ = 66388063283 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 20960862 + ... + 20964028.

It is an arithmetic number, because the mean of its divisors is an integer number (1539648000).

Almost surely, 2^66388063315 is an apocalyptic number.

66388063315 is a deficient number, since it is larger than the sum of its proper divisors (32149408685).

66388063315 is a wasteful number, since it uses less digits than its factorization.

66388063315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3929 (or 3915 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 49.

The spelling of 66388063315 in words is "sixty-six billion, three hundred eighty-eight million, sixty-three thousand, three hundred fifteen".