2665374553919 has 16 divisors (see below), whose sum is σ = 3385763712000. Its totient is φ = 2037728153760.

The previous prime is 2665374553909. The next prime is 2665374553957. The reversal of 2665374553919 is 9193554735662.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2665374553919 - 2¹² = 2665374549823 is a prime.

It is a super-2 number, since 2×2665374553919² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2665374553909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 326554919 + ... + 326563080.

It is an arithmetic number, because the mean of its divisors is an integer number (211610232000).

Almost surely, 2^{2665374553919} is an apocalyptic number.

2665374553919 is a deficient number, since it is larger than the sum of its proper divisors (720389158081).

2665374553919 is a wasteful number, since it uses less digits than its factorization.

2665374553919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653118070.

The product of its digits is 183708000, while the sum is 65.

The spelling of 2665374553919 in words is "two trillion, six hundred sixty-five billion, three hundred seventy-four million, five hundred fifty-three thousand, nine hundred nineteen".