66873442 has 8 divisors (see below), whose sum is σ = 100349532. Its totient is φ = 33423600.

The previous prime is 66873431. The next prime is 66873451. The reversal of 66873442 is 24437866.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 48734361 + 18139081 = 6981^2 + 4259^2 .

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 = 66873395 and 66873404.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2092 + ... + 11752.

Almost surely, 2^66873442 is an apocalyptic number.

66873442 is a deficient number, since it is larger than the sum of its proper divisors (33476090).

66873442 is a wasteful number, since it uses less digits than its factorization.

66873442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13124.

The product of its digits is 193536, while the sum is 40.

The square root of 66873442 is about 8177.6183574437. The cubic root of 66873442 is about 405.8989168138.

The spelling of 66873442 in words is "sixty-six million, eight hundred seventy-three thousand, four hundred forty-two".