66453505 has 8 divisors (see below), whose sum is σ = 80063424. Its totient is φ = 52950000.

The previous prime is 66453479. The next prime is 66453521. The reversal of 66453505 is 50535466.

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

It is not a de Polignac number, because 66453505 - 2⁵ = 66453473 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25221 + ... + 27730.

It is an arithmetic number, because the mean of its divisors is an integer number (10007928).

It is a Proth number, since it is equal to 507 ⋅ 2¹⁷ + 1 and 507 < 2¹⁷.

Almost surely, 2^66453505 is an apocalyptic number.

It is an amenable number.

66453505 is a deficient number, since it is larger than the sum of its proper divisors (13609919).

66453505 is a wasteful number, since it uses less digits than its factorization.

66453505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53207.

The product of its (nonzero) digits is 54000, while the sum is 34.

The square root of 66453505 is about 8151.9019253178. The cubic root of 66453505 is about 405.0475075094.

The spelling of 66453505 in words is "sixty-six million, four hundred fifty-three thousand, five hundred five".