66577942 has 8 divisors (see below), whose sum is σ = 100585800. Its totient is φ = 33049344.

The previous prime is 66577879. The next prime is 66577943. The reversal of 66577942 is 24977566.

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 = 66577892 and 66577901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66577943) by changing a digit.

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, 119467 + ... + 120022.

It is an arithmetic number, because the mean of its divisors is an integer number (12573225).

Almost surely, 2^66577942 is an apocalyptic number.

66577942 is a deficient number, since it is larger than the sum of its proper divisors (34007858).

66577942 is a wasteful number, since it uses less digits than its factorization.

66577942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239630.

The product of its digits is 635040, while the sum is 46.

The square root of 66577942 is about 8159.5307463113. The cubic root of 66577942 is about 405.3001727318.

The spelling of 66577942 in words is "sixty-six million, five hundred seventy-seven thousand, nine hundred forty-two".