66883949 has 8 divisors (see below), whose sum is σ = 73044192. Its totient is φ = 60737040.

The previous prime is 66883939. The next prime is 66883951. The reversal of 66883949 is 94938866.

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

It is a cyclic number.

It is not a de Polignac number, because 66883949 - 2⁸ = 66883693 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66883949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66883939) 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, 9242 + ... + 14804.

It is an arithmetic number, because the mean of its divisors is an integer number (9130524).

Almost surely, 2^66883949 is an apocalyptic number.

It is an amenable number.

66883949 is a deficient number, since it is larger than the sum of its proper divisors (6160243).

66883949 is a wasteful number, since it uses less digits than its factorization.

66883949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6667.

The product of its digits is 2239488, while the sum is 53.

The square root of 66883949 is about 8178.2607564200. The cubic root of 66883949 is about 405.9201736658.

The spelling of 66883949 in words is "sixty-six million, eight hundred eighty-three thousand, nine hundred forty-nine".