2670781698 has 54 divisors (see below), whose sum is σ = 6272759259. Its totient is φ = 820901952.

The previous prime is 2670781691. The next prime is 2670781769. The reversal of 2670781698 is 8961870762.

It can be written as a sum of positive squares in 5 ways, for example, as 67026969 + 2603754729 = 8187^2 + 51027^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=36543.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (2670781691) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2849886 + ... + 2850822.

Almost surely, 2^2670781698 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2670781698

2670781698 is an abundant number, since it is smaller than the sum of its proper divisors (3601977561).

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

2670781698 is an equidigital number, since it uses as much as digits as its factorization.

2670781698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1908 (or 955 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 54.

The square root of 2670781698 is about 51679.6062098000. The cubic root of 2670781698 is about 1387.4354829509.

The spelling of 2670781698 in words is "two billion, six hundred seventy million, seven hundred eighty-one thousand, six hundred ninety-eight".