2665242439478 has 16 divisors (see below), whose sum is σ = 4095450673776. Its totient is φ = 1300093455360.

The previous prime is 2665242439477. The next prime is 2665242439487. The reversal of 2665242439478 is 8749342425662.

2665242439478 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2665242439478² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2665242439478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2665242439477) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4457825 + ... + 5020227.

It is an arithmetic number, because the mean of its divisors is an integer number (255965667111).

Almost surely, 2^{2665242439478} is an apocalyptic number.

2665242439478 is a deficient number, since it is larger than the sum of its proper divisors (1430208234298).

2665242439478 is a wasteful number, since it uses less digits than its factorization.

2665242439478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620239.

The product of its digits is 139345920, while the sum is 62.

The spelling of 2665242439478 in words is "two trillion, six hundred sixty-five billion, two hundred forty-two million, four hundred thirty-nine thousand, four hundred seventy-eight".