39666245 has 8 divisors (see below), whose sum is σ = 47660184. Its totient is φ = 31692544.

The previous prime is 39666233. The next prime is 39666251. The reversal of 39666245 is 54266693.

It can be written as a sum of positive squares in 4 ways, for example, as 3690241 + 35976004 = 1921^2 + 5998^2 .

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 39666245 - 2⁶ = 39666181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 344 + ... + 8913.

It is an arithmetic number, because the mean of its divisors is an integer number (5957523).

Almost surely, 2^39666245 is an apocalyptic number.

It is an amenable number.

39666245 is a deficient number, since it is larger than the sum of its proper divisors (7993939).

39666245 is an equidigital number, since it uses as much as digits as its factorization.

39666245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10119.

The product of its digits is 233280, while the sum is 41.

The square root of 39666245 is about 6298.1144003583. The cubic root of 39666245 is about 341.0413431009.

The spelling of 39666245 in words is "thirty-nine million, six hundred sixty-six thousand, two hundred forty-five".