66124766 has 4 divisors (see below), whose sum is σ = 99187152. Its totient is φ = 33062382.

The previous prime is 66124763. The next prime is 66124783. The reversal of 66124766 is 66742166.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66124763) 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 as a sum of consecutive naturals, namely, 16531190 + ... + 16531193.

It is an arithmetic number, because the mean of its divisors is an integer number (24796788).

Almost surely, 2^66124766 is an apocalyptic number.

66124766 is a deficient number, since it is larger than the sum of its proper divisors (33062386).

66124766 is a wasteful number, since it uses less digits than its factorization.

66124766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33062385.

The product of its digits is 72576, while the sum is 38.

The square root of 66124766 is about 8131.7135955468. The cubic root of 66124766 is about 404.3784929549.

The spelling of 66124766 in words is "sixty-six million, one hundred twenty-four thousand, seven hundred sixty-six".