66359669 has 4 divisors (see below), whose sum is σ = 69244896. Its totient is φ = 63474444.

The previous prime is 66359663. The next prime is 66359717. The reversal of 66359669 is 96695366.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 96695366 = 2 ⋅48347683.

It is a cyclic number.

It is not a de Polignac number, because 66359669 - 2²⁴ = 49582453 is a prime.

It is a super-2 number, since 2×66359669² = 8807211339579122, which 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 (66359663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1442579 + ... + 1442624.

It is an arithmetic number, because the mean of its divisors is an integer number (17311224).

Almost surely, 2^66359669 is an apocalyptic number.

It is an amenable number.

66359669 is a deficient number, since it is larger than the sum of its proper divisors (2885227).

66359669 is a wasteful number, since it uses less digits than its factorization.

66359669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2885226.

The product of its digits is 1574640, while the sum is 50.

The square root of 66359669 is about 8146.1444254322. The cubic root of 66359669 is about 404.8567679250.

The spelling of 66359669 in words is "sixty-six million, three hundred fifty-nine thousand, six hundred sixty-nine".