66097426369 has 8 divisors (see below), whose sum is σ = 71187457320. Its totient is φ = 61008197376.

The previous prime is 66097426361. The next prime is 66097426411. The reversal of 66097426369 is 96362479066.

It can be written as a sum of positive squares in 4 ways, for example, as 397483969 + 65699942400 = 19937^2 + 256320^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66097426369 - 2³ = 66097426361 is a prime.

It is a super-2 number, since 2×66097426369² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66097426361) 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, 23512 + ... + 364345.

It is an arithmetic number, because the mean of its divisors is an integer number (8898432165).

Almost surely, 2^66097426369 is an apocalyptic number.

It is an amenable number.

66097426369 is a deficient number, since it is larger than the sum of its proper divisors (5090030951).

66097426369 is a wasteful number, since it uses less digits than its factorization.

66097426369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400979.

The product of its (nonzero) digits is 17635968, while the sum is 58.

The spelling of 66097426369 in words is "sixty-six billion, ninety-seven million, four hundred twenty-six thousand, three hundred sixty-nine".