2642758866 has 64 divisors (see below), whose sum is σ = 6613401600. Its totient is φ = 774997200.

The previous prime is 2642758861. The next prime is 2642758871. The reversal of 2642758866 is 6688572462.

It is an interprime number because it is at equal distance from previous prime (2642758861) and next prime (2642758871).

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

It is not an unprimeable number, because it can be changed into a prime (2642758861) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53346 + ... + 90173.

It is an arithmetic number, because the mean of its divisors is an integer number (103334400).

Almost surely, 2^2642758866 is an apocalyptic number.

2642758866 is an abundant number, since it is smaller than the sum of its proper divisors (3970642734).

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

2642758866 is a wasteful number, since it uses less digits than its factorization.

2642758866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143572 (or 143566 counting only the distinct ones).

The product of its digits is 7741440, while the sum is 54.

The square root of 2642758866 is about 51407.7704826809. The cubic root of 2642758866 is about 1382.5659160638.

The spelling of 2642758866 in words is "two billion, six hundred forty-two million, seven hundred fifty-eight thousand, eight hundred sixty-six".