1040665691626 has 12 divisors (see below), whose sum is σ = 1715808310146. Its totient is φ = 473029859720.

The previous prime is 1040665691581. The next prime is 1040665691701. The reversal of 1040665691626 is 6261965660401.

It can be written as a sum of positive squares in only one way, i.e., 911748071025 + 128917620601 = 954855^2 + 359051^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2150135485 + ... + 2150135968.

Almost surely, 2^{1040665691626} is an apocalyptic number.

1040665691626 is a deficient number, since it is larger than the sum of its proper divisors (675142618520).

1040665691626 is a wasteful number, since it uses less digits than its factorization.

1040665691626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4300271477 (or 4300271466 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 52.

The spelling of 1040665691626 in words is "one trillion, forty billion, six hundred sixty-five million, six hundred ninety-one thousand, six hundred twenty-six".