66042942 has 32 divisors (see below), whose sum is σ = 151200000. Its totient is φ = 18838848.

The previous prime is 66042941. The next prime is 66042953. The reversal of 66042942 is 24924066.

It is a happy number.

It is a super-3 number, since 3×66042942³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66042941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43309 + ... + 44807.

It is an arithmetic number, because the mean of its divisors is an integer number (4725000).

Almost surely, 2^66042942 is an apocalyptic number.

66042942 is an abundant number, since it is smaller than the sum of its proper divisors (85157058).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66042942 is a wasteful number, since it uses less digits than its factorization.

66042942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2560.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 66042942 is about 8126.6808722873. The cubic root of 66042942 is about 404.2116289843.

The spelling of 66042942 in words is "sixty-six million, forty-two thousand, nine hundred forty-two".