66761146 has 4 divisors (see below), whose sum is σ = 100141722. Its totient is φ = 33380572.

The previous prime is 66761143. The next prime is 66761153. The reversal of 66761146 is 64116766.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 60233121 + 6528025 = 7761^2 + 2555^2 .

It is not an unprimeable number, because it can be changed into a prime (66761143) 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 as a sum of consecutive naturals, namely, 16690285 + ... + 16690288.

Almost surely, 2^66761146 is an apocalyptic number.

66761146 is a deficient number, since it is larger than the sum of its proper divisors (33380576).

66761146 is a wasteful number, since it uses less digits than its factorization.

66761146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33380575.

The product of its digits is 36288, while the sum is 37.

The square root of 66761146 is about 8170.7494148334. The cubic root of 66761146 is about 405.6715900863.

The spelling of 66761146 in words is "sixty-six million, seven hundred sixty-one thousand, one hundred forty-six".