66168153 has 6 divisors (see below), whose sum is σ = 95576234. Its totient is φ = 44112096.

The previous prime is 66168139. The next prime is 66168161. The reversal of 66168153 is 35186166.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 65804544 + 363609 = 8112^2 + 603^2 .

It is not a de Polignac number, because 66168153 - 2⁹ = 66167641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66168253) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3676000 + ... + 3676017.

Almost surely, 2^66168153 is an apocalyptic number.

It is an amenable number.

66168153 is a deficient number, since it is larger than the sum of its proper divisors (29408081).

66168153 is a wasteful number, since it uses less digits than its factorization.

66168153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7352023 (or 7352020 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 66168153 is about 8134.3809229713. The cubic root of 66168153 is about 404.4669163746.

The spelling of 66168153 in words is "sixty-six million, one hundred sixty-eight thousand, one hundred fifty-three".