66475642 has 8 divisors (see below), whose sum is σ = 104961600. Its totient is φ = 31488444.

The previous prime is 66475639. The next prime is 66475657. The reversal of 66475642 is 24657466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 66475595 and 66475604.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 874642 + ... + 874717.

It is an arithmetic number, because the mean of its divisors is an integer number (13120200).

Almost surely, 2^66475642 is an apocalyptic number.

66475642 is a deficient number, since it is larger than the sum of its proper divisors (38485958).

66475642 is a wasteful number, since it uses less digits than its factorization.

66475642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1749380.

The product of its digits is 241920, while the sum is 40.

The square root of 66475642 is about 8153.2595935613. The cubic root of 66475642 is about 405.0924790085.

The spelling of 66475642 in words is "sixty-six million, four hundred seventy-five thousand, six hundred forty-two".