66455339 has 4 divisors (see below), whose sum is σ = 68000856. Its totient is φ = 64909824.

The previous prime is 66455309. The next prime is 66455359. The reversal of 66455339 is 93355466.

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

It is a cyclic number.

It is not a de Polignac number, because 66455339 - 2²⁰ = 65406763 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66455296 and 66455305.

It is not an unprimeable number, because it can be changed into a prime (66455309) 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, 772694 + ... + 772779.

It is an arithmetic number, because the mean of its divisors is an integer number (17000214).

Almost surely, 2^66455339 is an apocalyptic number.

66455339 is a deficient number, since it is larger than the sum of its proper divisors (1545517).

66455339 is a wasteful number, since it uses less digits than its factorization.

66455339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1545516.

The product of its digits is 291600, while the sum is 41.

The square root of 66455339 is about 8152.0144136281. The cubic root of 66455339 is about 405.0512336750.

The spelling of 66455339 in words is "sixty-six million, four hundred fifty-five thousand, three hundred thirty-nine".