2661797376 has 400 divisors, whose sum is σ = 9304520544. Its totient is φ = 741851136.

The previous prime is 2661797371. The next prime is 2661797387. The reversal of 2661797376 is 6737971662.

2661797376 is a `hidden beast` number, since 266 + 1 + 7 + 9 + 7 + 376 = 666.

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661797371) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 15386026 + ... + 15386198.

Almost surely, 2^2661797376 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2661797376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4652260272).

2661797376 is an abundant number, since it is smaller than the sum of its proper divisors (6642723168).

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

2661797376 is an equidigital number, since it uses as much as digits as its factorization.

2661797376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263 (or 238 counting only the distinct ones).

The product of its digits is 4000752, while the sum is 54.

The square root of 2661797376 is about 51592.6097033286. The cubic root of 2661797376 is about 1385.8779900468.

The spelling of 2661797376 in words is "two billion, six hundred sixty-one million, seven hundred ninety-seven thousand, three hundred seventy-six".