66799153 has 4 divisors (see below), whose sum is σ = 69703488. Its totient is φ = 63894820.

The previous prime is 66799123. The next prime is 66799163. The reversal of 66799153 is 35199766.

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 a cyclic number.

It is not a de Polignac number, because 66799153 - 2²⁵ = 33244721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66799123) 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, 1452133 + ... + 1452178.

It is an arithmetic number, because the mean of its divisors is an integer number (17425872).

Almost surely, 2^66799153 is an apocalyptic number.

It is an amenable number.

66799153 is a deficient number, since it is larger than the sum of its proper divisors (2904335).

66799153 is a wasteful number, since it uses less digits than its factorization.

66799153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2904334.

The product of its digits is 306180, while the sum is 46.

The square root of 66799153 is about 8173.0748803617. The cubic root of 66799153 is about 405.7485581837.

The spelling of 66799153 in words is "sixty-six million, seven hundred ninety-nine thousand, one hundred fifty-three".