66129151 has 4 divisors (see below), whose sum is σ = 72140904. Its totient is φ = 60117400.

The previous prime is 66129143. The next prime is 66129179. The reversal of 66129151 is 15192166.

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 66129151 - 2³ = 66129143 is a prime.

It is a super-2 number, since 2×66129151² = 8746129223961602, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66129181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3005860 + ... + 3005881.

It is an arithmetic number, because the mean of its divisors is an integer number (18035226).

Almost surely, 2^66129151 is an apocalyptic number.

66129151 is a deficient number, since it is larger than the sum of its proper divisors (6011753).

66129151 is a wasteful number, since it uses less digits than its factorization.

66129151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6011752.

The product of its digits is 3240, while the sum is 31.

The square root of 66129151 is about 8131.9832144441. The cubic root of 66129151 is about 404.3874314138.

The spelling of 66129151 in words is "sixty-six million, one hundred twenty-nine thousand, one hundred fifty-one".