66161456 has 20 divisors (see below), whose sum is σ = 128407704. Its totient is φ = 33024000.

The previous prime is 66161453. The next prime is 66161461. The reversal of 66161456 is 65416166.

66161456 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (66161453) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 7031 + ... + 13481.

Almost surely, 2^66161456 is an apocalyptic number.

It is an amenable number.

66161456 is a deficient number, since it is larger than the sum of its proper divisors (62246248).

66161456 is a wasteful number, since it uses less digits than its factorization.

66161456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7100 (or 7094 counting only the distinct ones).

The product of its digits is 25920, while the sum is 35.

The square root of 66161456 is about 8133.9692647563. The cubic root of 66161456 is about 404.4532703017.

The spelling of 66161456 in words is "sixty-six million, one hundred sixty-one thousand, four hundred fifty-six".