66121151 has 8 divisors (see below), whose sum is σ = 69177024. Its totient is φ = 63134080.

The previous prime is 66121127. The next prime is 66121169. The reversal of 66121151 is 15112166.

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 66121151 - 2¹⁰ = 66120127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66121351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15230 + ... + 19083.

It is an arithmetic number, because the mean of its divisors is an integer number (8647128).

Almost surely, 2^66121151 is an apocalyptic number.

66121151 is a deficient number, since it is larger than the sum of its proper divisors (3055873).

66121151 is a wasteful number, since it uses less digits than its factorization.

66121151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34401.

The product of its digits is 360, while the sum is 23.

The square root of 66121151 is about 8131.4913146360. The cubic root of 66121151 is about 404.3711237801.

It can be divided in two parts, 661 and 21151, that added together give a palindrome (21812).

The spelling of 66121151 in words is "sixty-six million, one hundred twenty-one thousand, one hundred fifty-one".