66166383 has 8 divisors (see below), whose sum is σ = 88679728. Its totient is φ = 43881984.

The previous prime is 66166381. The next prime is 66166393. The reversal of 66166383 is 38366166.

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

It is not a de Polignac number, because 66166383 - 2¹ = 66166381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66166381) 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, 56560 + ... + 57717.

It is an arithmetic number, because the mean of its divisors is an integer number (11084966).

Almost surely, 2^66166383 is an apocalyptic number.

66166383 is a deficient number, since it is larger than the sum of its proper divisors (22513345).

66166383 is a wasteful number, since it uses less digits than its factorization.

66166383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114473.

The product of its digits is 93312, while the sum is 39.

The square root of 66166383 is about 8134.2721247817. The cubic root of 66166383 is about 404.4633098419.

The spelling of 66166383 in words is "sixty-six million, one hundred sixty-six thousand, three hundred eighty-three".