655006663642 has 8 divisors (see below), whose sum is σ = 982952374932. Its totient is φ = 327355872000.

The previous prime is 655006663627. The next prime is 655006663643. The reversal of 655006663642 is 246366600556.

It can be written as a sum of positive squares in 2 ways, for example, as 569256669081 + 85749994561 = 754491^2 + 292831^2 .

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

It is not an unprimeable number, because it can be changed into a prime (655006663643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73724359 + ... + 73733242.

Almost surely, 2^655006663642 is an apocalyptic number.

655006663642 is a deficient number, since it is larger than the sum of its proper divisors (327945711290).

655006663642 is a wasteful number, since it uses less digits than its factorization.

655006663642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147459824.

The product of its (nonzero) digits is 4665600, while the sum is 49.

The spelling of 655006663642 in words is "six hundred fifty-five billion, six million, six hundred sixty-three thousand, six hundred forty-two".