665201551048 has 8 divisors (see below), whose sum is σ = 1247252908230. Its totient is φ = 332600775520.

The previous prime is 665201551043. The next prime is 665201551097. The reversal of 665201551048 is 840155102566.

It can be written as a sum of positive squares in only one way, i.e., 380666788324 + 284534762724 = 616982^2 + 533418^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 665201550995 and 665201551013.

It is not an unprimeable number, because it can be changed into a prime (665201551043) 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 as a sum of consecutive naturals, namely, 41575096933 + ... + 41575096948.

Almost surely, 2^665201551048 is an apocalyptic number.

It is an amenable number.

665201551048 is a deficient number, since it is larger than the sum of its proper divisors (582051357182).

665201551048 is a wasteful number, since it uses less digits than its factorization.

665201551048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83150193887 (or 83150193883 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 43.

The spelling of 665201551048 in words is "six hundred sixty-five billion, two hundred one million, five hundred fifty-one thousand, forty-eight".