665877047 has 8 divisors (see below), whose sum is σ = 726881040. Its totient is φ = 604951360.

The previous prime is 665877031. The next prime is 665877053. The reversal of 665877047 is 740778566.

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 665877047 - 2⁴ = 665877031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 665876986 and 665877004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665877067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1022 + ... + 36507.

It is an arithmetic number, because the mean of its divisors is an integer number (90860130).

Almost surely, 2^665877047 is an apocalyptic number.

665877047 is a deficient number, since it is larger than the sum of its proper divisors (61003993).

665877047 is a wasteful number, since it uses less digits than its factorization.

665877047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39153.

The product of its (nonzero) digits is 1975680, while the sum is 50.

The square root of 665877047 is about 25804.5935251846. The cubic root of 665877047 is about 873.2354303198.

The spelling of 665877047 in words is "six hundred sixty-five million, eight hundred seventy-seven thousand, forty-seven".