66453902 has 4 divisors (see below), whose sum is σ = 99680856. Its totient is φ = 33226950.

The previous prime is 66453889. The next prime is 66453913. The reversal of 66453902 is 20935466.

66453902 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×66453902² = 8832242182051208, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16613474 + ... + 16613477.

It is an arithmetic number, because the mean of its divisors is an integer number (24920214).

Almost surely, 2^66453902 is an apocalyptic number.

66453902 is a deficient number, since it is larger than the sum of its proper divisors (33226954).

66453902 is a wasteful number, since it uses less digits than its factorization.

66453902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33226953.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 66453902 is about 8151.9262754272. The cubic root of 66453902 is about 405.0483141061.

The spelling of 66453902 in words is "sixty-six million, four hundred fifty-three thousand, nine hundred two".