66611050155 has 96 divisors (see below), whose sum is σ = 132729891840. Its totient is φ = 30629249280.

The previous prime is 66611050063. The next prime is 66611050171. The reversal of 66611050155 is 55105011666.

It is not a de Polignac number, because 66611050155 - 2¹³ = 66611041963 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 746962 + ... + 831368.

It is an arithmetic number, because the mean of its divisors is an integer number (1382603040).

Almost surely, 2^66611050155 is an apocalyptic number.

66611050155 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

66611050155 is a deficient number, since it is larger than the sum of its proper divisors (66118841685).

66611050155 is a wasteful number, since it uses less digits than its factorization.

66611050155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84521 (or 84518 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The spelling of 66611050155 in words is "sixty-six billion, six hundred eleven million, fifty thousand, one hundred fifty-five".