66545369 has 8 divisors (see below), whose sum is σ = 73965312. Its totient is φ = 59353840.

The previous prime is 66545363. The next prime is 66545377. The reversal of 66545369 is 96354566.

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 66545369 - 2¹² = 66541273 is a prime.

It is a super-2 number, since 2×66545369² = 8856572270692322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66545363) 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, 56489 + ... + 57654.

It is an arithmetic number, because the mean of its divisors is an integer number (9245664).

Almost surely, 2^66545369 is an apocalyptic number.

It is an amenable number.

66545369 is a deficient number, since it is larger than the sum of its proper divisors (7419943).

66545369 is a wasteful number, since it uses less digits than its factorization.

66545369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114207.

The product of its digits is 583200, while the sum is 44.

The square root of 66545369 is about 8157.5344927251. The cubic root of 66545369 is about 405.2340647702.

The spelling of 66545369 in words is "sixty-six million, five hundred forty-five thousand, three hundred sixty-nine".