66453550 has 24 divisors (see below), whose sum is σ = 123889392. Its totient is φ = 26520000.

The previous prime is 66453539. The next prime is 66453559. The reversal of 66453550 is 5535466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66453559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24775 + ... + 27325.

It is an arithmetic number, because the mean of its divisors is an integer number (5162058).

Almost surely, 2^66453550 is an apocalyptic number.

66453550 is a deficient number, since it is larger than the sum of its proper divisors (57435842).

66453550 is a wasteful number, since it uses less digits than its factorization.

66453550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3084 (or 3079 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 34.

The square root of 66453550 is about 8151.9046854094. The cubic root of 66453550 is about 405.0475989374.

The spelling of 66453550 in words is "sixty-six million, four hundred fifty-three thousand, five hundred fifty".