66453643 has 8 divisors (see below), whose sum is σ = 67268448. Its totient is φ = 65642304.

The previous prime is 66453641. The next prime is 66453671. The reversal of 66453643 is 34635466.

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 66453643 - 2¹ = 66453641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66453641) 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, 69255 + ... + 70207.

It is an arithmetic number, because the mean of its divisors is an integer number (8408556).

Almost surely, 2^66453643 is an apocalyptic number.

66453643 is a deficient number, since it is larger than the sum of its proper divisors (814805).

66453643 is a wasteful number, since it uses less digits than its factorization.

66453643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1733.

The product of its digits is 155520, while the sum is 37.

The square root of 66453643 is about 8151.9103895958. The cubic root of 66453643 is about 405.0477878885.

The spelling of 66453643 in words is "sixty-six million, four hundred fifty-three thousand, six hundred forty-three".