66942149 has 8 divisors (see below), whose sum is σ = 70730880. Its totient is φ = 63180000.

The previous prime is 66942143. The next prime is 66942157. The reversal of 66942149 is 94124966.

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

It is a cyclic number.

It is not a de Polignac number, because 66942149 - 2⁴ = 66942133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66942143) 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 7 ways as a sum of consecutive naturals, for example, 1352 + ... + 11649.

It is an arithmetic number, because the mean of its divisors is an integer number (8841360).

Almost surely, 2^66942149 is an apocalyptic number.

It is an amenable number.

66942149 is a deficient number, since it is larger than the sum of its proper divisors (3788731).

66942149 is a wasteful number, since it uses less digits than its factorization.

66942149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13291.

The product of its digits is 93312, while the sum is 41.

The square root of 66942149 is about 8181.8181964646. The cubic root of 66942149 is about 406.0378785629.

The spelling of 66942149 in words is "sixty-six million, nine hundred forty-two thousand, one hundred forty-nine".