66553043 has 8 divisors (see below), whose sum is σ = 68311440. Its totient is φ = 64817280.

The previous prime is 66553033. The next prime is 66553049. The reversal of 66553043 is 34035566.

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 66553043 - 2⁴ = 66553027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66553049) 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, 383 + ... + 11543.

It is an arithmetic number, because the mean of its divisors is an integer number (8538930).

Almost surely, 2^66553043 is an apocalyptic number.

66553043 is a deficient number, since it is larger than the sum of its proper divisors (1758397).

66553043 is a wasteful number, since it uses less digits than its factorization.

66553043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11317.

The product of its (nonzero) digits is 32400, while the sum is 32.

The square root of 66553043 is about 8158.0048418716. The cubic root of 66553043 is about 405.2496413447.

The spelling of 66553043 in words is "sixty-six million, five hundred fifty-three thousand, forty-three".