66454505 has 8 divisors (see below), whose sum is σ = 85879752. Its totient is φ = 49074048.

The previous prime is 66454501. The next prime is 66454511. The reversal of 66454505 is 50545466.

It can be written as a sum of positive squares in 4 ways, for example, as 15460624 + 50993881 = 3932^2 + 7141^2 .

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 66454505 - 2² = 66454501 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66454501) 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, 511124 + ... + 511253.

It is an arithmetic number, because the mean of its divisors is an integer number (10734969).

Almost surely, 2^66454505 is an apocalyptic number.

66454505 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

66454505 is a deficient number, since it is larger than the sum of its proper divisors (19425247).

66454505 is a wasteful number, since it uses less digits than its factorization.

66454505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022395.

The product of its (nonzero) digits is 72000, while the sum is 35.

The square root of 66454505 is about 8151.9632604668. The cubic root of 66454505 is about 405.0495392331.

The spelling of 66454505 in words is "sixty-six million, four hundred fifty-four thousand, five hundred five".