665435845570 has 32 divisors (see below), whose sum is σ = 1209868627968. Its totient is φ = 263490927168.

The previous prime is 665435845559. The next prime is 665435845603. The reversal of 665435845570 is 75548534566.

It is a happy number.

665435845570 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2647392 + ... + 2887828.

It is an arithmetic number, because the mean of its divisors is an integer number (37808394624).

Almost surely, 2^665435845570 is an apocalyptic number.

665435845570 is a deficient number, since it is larger than the sum of its proper divisors (544432782398).

665435845570 is a wasteful number, since it uses less digits than its factorization.

665435845570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243234.

The product of its (nonzero) digits is 60480000, while the sum is 58.

The spelling of 665435845570 in words is "six hundred sixty-five billion, four hundred thirty-five million, eight hundred forty-five thousand, five hundred seventy".