66676742 has 32 divisors (see below), whose sum is σ = 115668000. Its totient is φ = 28537600.

The previous prime is 66676699. The next prime is 66676759. The reversal of 66676742 is 24767666.

It is a happy number.

66676742 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 66676693 and 66676702.

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 in 15 ways as a sum of consecutive naturals, for example, 24884 + ... + 27432.

It is an arithmetic number, because the mean of its divisors is an integer number (3614625).

Almost surely, 2^66676742 is an apocalyptic number.

66676742 is a deficient number, since it is larger than the sum of its proper divisors (48991258).

66676742 is a wasteful number, since it uses less digits than its factorization.

66676742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2632.

The product of its digits is 508032, while the sum is 44.

The square root of 66676742 is about 8165.5827716091. The cubic root of 66676742 is about 405.5005587468.

The spelling of 66676742 in words is "sixty-six million, six hundred seventy-six thousand, seven hundred forty-two".