66999342 has 16 divisors (see below), whose sum is σ = 134749440. Its totient is φ = 22207992.

The previous prime is 66999323. The next prime is 66999407. The reversal of 66999342 is 24399966.

It is a junction number, because it is equal to n+sod(n) for n = 66999291 and 66999300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30118 + ... + 32265.

It is an arithmetic number, because the mean of its divisors is an integer number (8421840).

Almost surely, 2^66999342 is an apocalyptic number.

66999342 is an abundant number, since it is smaller than the sum of its proper divisors (67750098).

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

66999342 is a wasteful number, since it uses less digits than its factorization.

66999342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62567.

The product of its digits is 629856, while the sum is 48.

The square root of 66999342 is about 8185.3125780266. The cubic root of 66999342 is about 406.1534804389.

The spelling of 66999342 in words is "sixty-six million, nine hundred ninety-nine thousand, three hundred forty-two".