665148863636 has 48 divisors (see below), whose sum is σ = 1203902687232. Its totient is φ = 321219225600.

The previous prime is 665148863633. The next prime is 665148863663. The reversal of 665148863636 is 636368841566.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665148863633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 212031860 + ... + 212034996.

It is an arithmetic number, because the mean of its divisors is an integer number (25081305984).

Almost surely, 2^665148863636 is an apocalyptic number.

It is an amenable number.

665148863636 is a deficient number, since it is larger than the sum of its proper divisors (538753823596).

665148863636 is a wasteful number, since it uses less digits than its factorization.

665148863636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5960 (or 5958 counting only the distinct ones).

The product of its digits is 89579520, while the sum is 62.

The spelling of 665148863636 in words is "six hundred sixty-five billion, one hundred forty-eight million, eight hundred sixty-three thousand, six hundred thirty-six".