40660644012605 has 8 divisors (see below), whose sum is σ = 50111496404952. Its totient is φ = 31649366150208.

The previous prime is 40660644012601. The next prime is 40660644012617. The reversal of 40660644012605 is 50621044606604.

It can be written as a sum of positive squares in 4 ways, for example, as 9321315804889 + 31339328207716 = 3053083^2 + 5598154^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40660644012605 - 2² = 40660644012601 is a prime.

It is a super-4 number, since 4×40660644012605⁴ (a number of 56 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40660644012601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109893632282 + ... + 109893632651.

It is an arithmetic number, because the mean of its divisors is an integer number (6263937050619).

Almost surely, 2^{40660644012605} is an apocalyptic number.

It is an amenable number.

40660644012605 is a deficient number, since it is larger than the sum of its proper divisors (9450852392347).

40660644012605 is a wasteful number, since it uses less digits than its factorization.

40660644012605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219787264975.

The product of its (nonzero) digits is 829440, while the sum is 44.

The spelling of 40660644012605 in words is "forty trillion, six hundred sixty billion, six hundred forty-four million, twelve thousand, six hundred five".