66158368 has 48 divisors (see below), whose sum is σ = 135825984. Its totient is φ = 31691520.

The previous prime is 66158341. The next prime is 66158369. The reversal of 66158368 is 86385166.

It is not an unprimeable number, because it can be changed into a prime (66158369) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83671 + ... + 84457.

It is an arithmetic number, because the mean of its divisors is an integer number (2829708).

Almost surely, 2^66158368 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66158368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67912992).

66158368 is an abundant number, since it is smaller than the sum of its proper divisors (69667616).

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

66158368 is a wasteful number, since it uses less digits than its factorization.

66158368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 905 (or 897 counting only the distinct ones).

The product of its digits is 207360, while the sum is 43.

The square root of 66158368 is about 8133.7794413175. The cubic root of 66158368 is about 404.4469777601.

The spelling of 66158368 in words is "sixty-six million, one hundred fifty-eight thousand, three hundred sixty-eight".