665211804473 has 8 divisors (see below), whose sum is σ = 676544719200. Its totient is φ = 653880827808.

The previous prime is 665211804469. The next prime is 665211804479. The reversal of 665211804473 is 374408112566.

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 665211804473 - 2² = 665211804469 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665211804479) 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, 216365 + ... + 1173557.

It is an arithmetic number, because the mean of its divisors is an integer number (84568089900).

Almost surely, 2^665211804473 is an apocalyptic number.

It is an amenable number.

665211804473 is a deficient number, since it is larger than the sum of its proper divisors (11332914727).

665211804473 is a wasteful number, since it uses less digits than its factorization.

665211804473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969031.

The product of its (nonzero) digits is 967680, while the sum is 47.

The spelling of 665211804473 in words is "six hundred sixty-five billion, two hundred eleven million, eight hundred four thousand, four hundred seventy-three".