66039738 has 8 divisors (see below), whose sum is σ = 132079488. Its totient is φ = 22013244.

The previous prime is 66039671. The next prime is 66039751. The reversal of 66039738 is 83793066.

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

66039738 is an admirable number.

It is a super-2 number, since 2×66039738² = 8722493990217288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66039738.

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, 5503306 + ... + 5503317.

It is an arithmetic number, because the mean of its divisors is an integer number (16509936).

Almost surely, 2^66039738 is an apocalyptic number.

66039738 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66039738 is a wasteful number, since it uses less digits than its factorization.

66039738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11006628.

The product of its (nonzero) digits is 163296, while the sum is 42.

The square root of 66039738 is about 8126.4837414469. The cubic root of 66039738 is about 404.2050922524.

The spelling of 66039738 in words is "sixty-six million, thirty-nine thousand, seven hundred thirty-eight".