66653059 has 4 divisors (see below), whose sum is σ = 72712440. Its totient is φ = 60593680.

The previous prime is 66652997. The next prime is 66653063. The reversal of 66653059 is 95035666.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66653059 - 2¹³ = 66644867 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66653099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3029674 + ... + 3029695.

It is an arithmetic number, because the mean of its divisors is an integer number (18178110).

Almost surely, 2^66653059 is an apocalyptic number.

66653059 is a deficient number, since it is larger than the sum of its proper divisors (6059381).

66653059 is a wasteful number, since it uses less digits than its factorization.

66653059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6059380.

The product of its (nonzero) digits is 145800, while the sum is 40.

The square root of 66653059 is about 8164.1324707528. The cubic root of 66653059 is about 405.4525429685.

The spelling of 66653059 in words is "sixty-six million, six hundred fifty-three thousand, fifty-nine".