66515351455 has 32 divisors (see below), whose sum is σ = 91511038080. Its totient is φ = 45465753600.

The previous prime is 66515351431. The next prime is 66515351467. The reversal of 66515351455 is 55415351566.

It is not a de Polignac number, because 66515351455 - 2¹⁵ = 66515318687 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28805841 + ... + 28808149.

It is an arithmetic number, because the mean of its divisors is an integer number (2859719940).

Almost surely, 2^66515351455 is an apocalyptic number.

66515351455 is a deficient number, since it is larger than the sum of its proper divisors (24995686625).

66515351455 is a wasteful number, since it uses less digits than its factorization.

66515351455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4579.

The product of its digits is 1350000, while the sum is 46.

The spelling of 66515351455 in words is "sixty-six billion, five hundred fifteen million, three hundred fifty-one thousand, four hundred fifty-five".