665047740988 has 12 divisors (see below), whose sum is σ = 1163866688712. Its totient is φ = 332514401360.

The previous prime is 665047740947. The next prime is 665047740997. The reversal of 665047740988 is 889047740566.

It is a super-2 number, since 2×665047740988² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2208070 + ... + 2491117.

It is an arithmetic number, because the mean of its divisors is an integer number (96988890726).

Almost surely, 2^665047740988 is an apocalyptic number.

It is an amenable number.

665047740988 is a deficient number, since it is larger than the sum of its proper divisors (498818947724).

665047740988 is a wasteful number, since it uses less digits than its factorization.

665047740988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4734572 (or 4734570 counting only the distinct ones).

The product of its (nonzero) digits is 81285120, while the sum is 64.

The spelling of 665047740988 in words is "six hundred sixty-five billion, forty-seven million, seven hundred forty thousand, nine hundred eighty-eight".