66683654 has 16 divisors (see below), whose sum is σ = 106066800. Its totient is φ = 31353984.

The previous prime is 66683653. The next prime is 66683677. The reversal of 66683654 is 45638666.

66683654 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66683651) 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 7 ways as a sum of consecutive naturals, for example, 1199 + ... + 11610.

It is an arithmetic number, because the mean of its divisors is an integer number (6629175).

Almost surely, 2^66683654 is an apocalyptic number.

66683654 is a deficient number, since it is larger than the sum of its proper divisors (39383146).

66683654 is a wasteful number, since it uses less digits than its factorization.

66683654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12967.

The product of its digits is 622080, while the sum is 44.

The square root of 66683654 is about 8166.0060004876. The cubic root of 66683654 is about 405.5145702443.

The spelling of 66683654 in words is "sixty-six million, six hundred eighty-three thousand, six hundred fifty-four".