61166066115 has 128 divisors (see below), whose sum is σ = 125325066240. Its totient is φ = 24738624000.

The previous prime is 61166066033. The next prime is 61166066131. The reversal of 61166066115 is 51166066116.

61166066115 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 61166066115 - 2⁸ = 61166065859 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 6878202 + ... + 6887088.

It is an arithmetic number, because the mean of its divisors is an integer number (979102080).

Almost surely, 2^61166066115 is an apocalyptic number.

61166066115 is an abundant number, since it is smaller than the sum of its proper divisors (64159000125).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61166066115 is a wasteful number, since it uses less digits than its factorization.

61166066115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9073.

The product of its (nonzero) digits is 38880, while the sum is 39.

Subtracting from 61166066115 its reverse (51166066116), we obtain a palindrome (9999999999).

The spelling of 61166066115 in words is "sixty-one billion, one hundred sixty-six million, sixty-six thousand, one hundred fifteen".