66083929 has 4 divisors (see below), whose sum is σ = 66108580. Its totient is φ = 66059280.

The previous prime is 66083921. The next prime is 66083959. The reversal of 66083929 is 92938066.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50083929 + 16000000 = 7077^2 + 4000^2 .

It is a cyclic number.

It is not a de Polignac number, because 66083929 - 2³ = 66083921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66083921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7734 + ... + 13855.

It is an arithmetic number, because the mean of its divisors is an integer number (16527145).

Almost surely, 2^66083929 is an apocalyptic number.

It is an amenable number.

66083929 is a deficient number, since it is larger than the sum of its proper divisors (24651).

66083929 is a wasteful number, since it uses less digits than its factorization.

66083929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24650.

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 66083929 is about 8129.2022363821. The cubic root of 66083929 is about 404.2952311347.

The spelling of 66083929 in words is "sixty-six million, eighty-three thousand, nine hundred twenty-nine".