66566647413 has 12 divisors (see below), whose sum is σ = 109887799008. Its totient is φ = 38038084200.

The previous prime is 66566647333. The next prime is 66566647429. The reversal of 66566647413 is 31474666566.

It is not a de Polignac number, because 66566647413 - 2⁸ = 66566647157 is a prime.

It is a super-2 number, since 2×66566647413² (a number of 22 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 66566647413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66566647453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 528306663 + ... + 528306788.

It is an arithmetic number, because the mean of its divisors is an integer number (9157316584).

Almost surely, 2^66566647413 is an apocalyptic number.

66566647413 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

66566647413 is a deficient number, since it is larger than the sum of its proper divisors (43321151595).

66566647413 is a wasteful number, since it uses less digits than its factorization.

66566647413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056613464 (or 1056613461 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 54.

The spelling of 66566647413 in words is "sixty-six billion, five hundred sixty-six million, six hundred forty-seven thousand, four hundred thirteen".