2662655640 has 32 divisors (see below), whose sum is σ = 7987967280. Its totient is φ = 710041472.

The previous prime is 2662655623. The next prime is 2662655657. The reversal of 2662655640 is 465562662.

2662655640 is nontrivially palindromic in base 9.

It is an interprime number because it is at equal distance from previous prime (2662655623) and next prime (2662655657).

It is a junction number, because it is equal to n+sod(n) for n = 2662655592 and 2662655601.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11094279 + ... + 11094518.

Almost surely, 2^2662655640 is an apocalyptic number.

2662655640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2662655640 is an abundant number, since it is smaller than the sum of its proper divisors (5325311640).

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

2662655640 is a wasteful number, since it uses less digits than its factorization.

2662655640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22188811 (or 22188807 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 42.

The square root of 2662655640 is about 51600.9267358640. The cubic root of 2662655640 is about 1386.0269271748.

The spelling of 2662655640 in words is "two billion, six hundred sixty-two million, six hundred fifty-five thousand, six hundred forty".