8276478661 has 16 divisors (see below), whose sum is σ = 9113047488. Its totient is φ = 7454160000.

The previous prime is 8276478649. The next prime is 8276478739. The reversal of 8276478661 is 1668746728.

It is a cyclic number.

It is not a de Polignac number, because 8276478661 - 2¹³ = 8276470469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8276478061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 782911 + ... + 793411.

It is an arithmetic number, because the mean of its divisors is an integer number (569565468).

Almost surely, 2^8276478661 is an apocalyptic number.

It is an amenable number.

8276478661 is a deficient number, since it is larger than the sum of its proper divisors (836568827).

8276478661 is a wasteful number, since it uses less digits than its factorization.

8276478661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11172.

The product of its digits is 5419008, while the sum is 55.

The square root of 8276478661 is about 90975.1540861570. The cubic root of 8276478661 is about 2022.7794516793.

The spelling of 8276478661 in words is "eight billion, two hundred seventy-six million, four hundred seventy-eight thousand, six hundred sixty-one".