66157746 has 8 divisors (see below), whose sum is σ = 132315504. Its totient is φ = 22052580.

The previous prime is 66157709. The next prime is 66157769. The reversal of 66157746 is 64775166.

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

66157746 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 66157698 and 66157707.

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, 5513140 + ... + 5513151.

It is an arithmetic number, because the mean of its divisors is an integer number (16539438).

Almost surely, 2^66157746 is an apocalyptic number.

66157746 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.

66157746 is a wasteful number, since it uses less digits than its factorization.

66157746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11026296.

The product of its digits is 211680, while the sum is 42.

The square root of 66157746 is about 8133.7412056200. The cubic root of 66157746 is about 404.4457102621.

The spelling of 66157746 in words is "sixty-six million, one hundred fifty-seven thousand, seven hundred forty-six".