61156166166 has 12 divisors (see below), whose sum is σ = 132505026732. Its totient is φ = 20385388716.

The previous prime is 61156166119. The next prime is 61156166207. The reversal of 61156166166 is 66166165116.

61156166166 is a `hidden beast` number, since 6 + 1 + 15 + 6 + 16 + 616 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1698782376 + ... + 1698782411.

It is an arithmetic number, because the mean of its divisors is an integer number (11042085561).

Almost surely, 2^61156166166 is an apocalyptic number.

61156166166 is an abundant number, since it is smaller than the sum of its proper divisors (71348860566).

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

61156166166 is a wasteful number, since it uses less digits than its factorization.

61156166166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3397564795 (or 3397564792 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The spelling of 61156166166 in words is "sixty-one billion, one hundred fifty-six million, one hundred sixty-six thousand, one hundred sixty-six".