76665253281813 has 24 divisors (see below), whose sum is σ = 126564533254016. Its totient is φ = 43806632349600.

The previous prime is 76665253281769. The next prime is 76665253281821. The reversal of 76665253281813 is 31818235256667.

It is not a de Polignac number, because 76665253281813 - 2¹³ = 76665253273621 is a prime.

It is a super-2 number, since 2×76665253281813² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76665253281863) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27606358 + ... + 30256263.

Almost surely, 2^{76665253281813} is an apocalyptic number.

It is an amenable number.

76665253281813 is a deficient number, since it is larger than the sum of its proper divisors (49899279972203).

76665253281813 is a wasteful number, since it uses less digits than its factorization.

76665253281813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57883665 (or 57883662 counting only the distinct ones).

The product of its digits is 87091200, while the sum is 63.

The spelling of 76665253281813 in words is "seventy-six trillion, six hundred sixty-five billion, two hundred fifty-three million, two hundred eighty-one thousand, eight hundred thirteen".