66123902 has 16 divisors (see below), whose sum is σ = 106983072. Its totient is φ = 30470880.

The previous prime is 66123901. The next prime is 66123907. The reversal of 66123902 is 20932166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66123901) 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 7 ways as a sum of consecutive naturals, for example, 19127 + ... + 22317.

It is an arithmetic number, because the mean of its divisors is an integer number (6686442).

Almost surely, 2^66123902 is an apocalyptic number.

66123902 is a deficient number, since it is larger than the sum of its proper divisors (40859170).

66123902 is a wasteful number, since it uses less digits than its factorization.

66123902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4003.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 66123902 is about 8131.6604700393. The cubic root of 66123902 is about 404.3767317160.

The spelling of 66123902 in words is "sixty-six million, one hundred twenty-three thousand, nine hundred two".