66354465 has 16 divisors (see below), whose sum is σ = 109828800. Its totient is φ = 34168512.

The previous prime is 66354437. The next prime is 66354467. The reversal of 66354465 is 56445366.

It is not a de Polignac number, because 66354465 - 2¹⁴ = 66338081 is a prime.

It is a super-5 number, since 5×66354465⁵ (a number of 40 digits) contains 55555 as substring.

It is not an unprimeable number, because it can be changed into a prime (66354467) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75835 + ... + 76704.

It is an arithmetic number, because the mean of its divisors is an integer number (6864300).

Almost surely, 2^66354465 is an apocalyptic number.

It is an amenable number.

66354465 is a deficient number, since it is larger than the sum of its proper divisors (43474335).

66354465 is a wasteful number, since it uses less digits than its factorization.

66354465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152576.

The product of its digits is 259200, while the sum is 39.

The square root of 66354465 is about 8145.8250042583. The cubic root of 66354465 is about 404.8461845404.

Subtracting from 66354465 its reverse (56445366), we obtain a palindrome (9909099).

The spelling of 66354465 in words is "sixty-six million, three hundred fifty-four thousand, four hundred sixty-five".