665913827 has 8 divisors (see below), whose sum is σ = 690965856. Its totient is φ = 641233152.

The previous prime is 665913823. The next prime is 665913869. The reversal of 665913827 is 728319566.

665913827 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 665913827 - 2² = 665913823 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665913823) 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, 89183 + ... + 96360.

It is an arithmetic number, because the mean of its divisors is an integer number (86370732).

Almost surely, 2^665913827 is an apocalyptic number.

665913827 is a deficient number, since it is larger than the sum of its proper divisors (25052029).

665913827 is a wasteful number, since it uses less digits than its factorization.

665913827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185677.

The product of its digits is 544320, while the sum is 47.

The square root of 665913827 is about 25805.3061791563. The cubic root of 665913827 is about 873.2515078664.

The spelling of 665913827 in words is "six hundred sixty-five million, nine hundred thirteen thousand, eight hundred twenty-seven".