1277087166 has 48 divisors (see below), whose sum is σ = 2945451600. Its totient is φ = 398749824.

The previous prime is 1277087131. The next prime is 1277087177. The reversal of 1277087166 is 6617807721.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9460 + ... + 51416.

It is an arithmetic number, because the mean of its divisors is an integer number (61363575).

Almost surely, 2^1277087166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1277087166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1472725800).

1277087166 is an abundant number, since it is smaller than the sum of its proper divisors (1668364434).

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

1277087166 is a wasteful number, since it uses less digits than its factorization.

1277087166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42073 (or 42070 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 45.

The square root of 1277087166 is about 35736.3563615543. The cubic root of 1277087166 is about 1084.9428119390.

The spelling of 1277087166 in words is "one billion, two hundred seventy-seven million, eighty-seven thousand, one hundred sixty-six".