66516230155 has 16 divisors (see below), whose sum is σ = 81248739264. Its totient is φ = 52266193920.

The previous prime is 66516230119. The next prime is 66516230189. The reversal of 66516230155 is 55103261566.

66516230155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66516230155 - 2⁹ = 66516229643 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 290119 + ... + 466048.

It is an arithmetic number, because the mean of its divisors is an integer number (5078046204).

Almost surely, 2^66516230155 is an apocalyptic number.

66516230155 is a deficient number, since it is larger than the sum of its proper divisors (14732509109).

66516230155 is a wasteful number, since it uses less digits than its factorization.

66516230155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756486.

The product of its (nonzero) digits is 162000, while the sum is 40.

The spelling of 66516230155 in words is "sixty-six billion, five hundred sixteen million, two hundred thirty thousand, one hundred fifty-five".