8661277485 has 48 divisors (see below), whose sum is σ = 17911771200. Its totient is φ = 3959438112.

The previous prime is 8661277441. The next prime is 8661277507. The reversal of 8661277485 is 5847721668.

8661277485 is a `hidden beast` number, since 86 + 6 + 12 + 77 + 485 = 666.

It is not a de Polignac number, because 8661277485 - 2⁶ = 8661277421 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 648055 + ... + 661284.

It is an arithmetic number, because the mean of its divisors is an integer number (373161900).

Almost surely, 2^8661277485 is an apocalyptic number.

It is an amenable number.

8661277485 is an abundant number, since it is smaller than the sum of its proper divisors (9250493715).

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

8661277485 is a wasteful number, since it uses less digits than its factorization.

8661277485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1309367 (or 1309354 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 54.

The square root of 8661277485 is about 93065.9845754613. The cubic root of 8661277485 is about 2053.6541990249.

It can be divided in two parts, 8661 and 277485, that added together give a triangular number (286146 = T₇₅₆).

The spelling of 8661277485 in words is "eight billion, six hundred sixty-one million, two hundred seventy-seven thousand, four hundred eighty-five".