66325306369 has 9 divisors (see below), whose sum is σ = 77156024961. Its totient is φ = 56848717380.

The previous prime is 66325306351. The next prime is 66325306409. The reversal of 66325306369 is 96360352366.

The square root of 66325306369 is 257537.

It is a perfect power (a square), and thus also a powerful number.

66325306369 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66325306369 - 2¹¹ = 66325304321 is a prime.

It is a super-2 number, since 2×66325306369² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66325306309) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1784364 + ... + 1821154.

Almost surely, 2^66325306369 is an apocalyptic number.

66325306369 is the 257537-th square number.

66325306369 is the 128769-th centered octagonal number.

It is an amenable number.

66325306369 is a deficient number, since it is larger than the sum of its proper divisors (10830718592).

66325306369 is an frugal number, since it uses more digits than its factorization.

66325306369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73596 (or 36798 counting only the distinct ones).

The product of its (nonzero) digits is 3149280, while the sum is 49.

Multiplying 66325306369 by its sum of digits (49), we get a square (3249940012081 = 1802759²).

66325306369 divided by its sum of digits (49) gives a square (1353577681 = 36791²).

The spelling of 66325306369 in words is "sixty-six billion, three hundred twenty-five million, three hundred six thousand, three hundred sixty-nine".