2777966820 has 192 divisors, whose sum is σ = 9224544000. Its totient is φ = 692001792.

The previous prime is 2777966777. The next prime is 2777966837. The reversal of 2777966820 is 286697772.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 747126 + ... + 750834.

It is an arithmetic number, because the mean of its divisors is an integer number (48044500).

Almost surely, 2^2777966820 is an apocalyptic number.

2777966820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2777966820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4612272000).

2777966820 is an abundant number, since it is smaller than the sum of its proper divisors (6446577180).

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

2777966820 is a wasteful number, since it uses less digits than its factorization.

2777966820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3819 (or 3811 counting only the distinct ones).

The product of its (nonzero) digits is 3556224, while the sum is 54.

The square root of 2777966820 is about 52706.4210509498. The cubic root of 2777966820 is about 1405.7529969899.

The spelling of 2777966820 in words is "two billion, seven hundred seventy-seven million, nine hundred sixty-six thousand, eight hundred twenty".