66243153 has 4 divisors (see below), whose sum is σ = 88324208. Its totient is φ = 44162100.

The previous prime is 66243137. The next prime is 66243157. The reversal of 66243153 is 35134266.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 66243153 - 2⁴ = 66243137 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66243153.

It is not an unprimeable number, because it can be changed into a prime (66243157) 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, 11040523 + ... + 11040528.

It is an arithmetic number, because the mean of its divisors is an integer number (22081052).

Almost surely, 2^66243153 is an apocalyptic number.

It is an amenable number.

66243153 is a deficient number, since it is larger than the sum of its proper divisors (22081055).

66243153 is a wasteful number, since it uses less digits than its factorization.

66243153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22081054.

The product of its digits is 12960, while the sum is 30.

The square root of 66243153 is about 8138.9896793152. The cubic root of 66243153 is about 404.6196764927.

The spelling of 66243153 in words is "sixty-six million, two hundred forty-three thousand, one hundred fifty-three".