661594691962 has 8 divisors (see below), whose sum is σ = 994683937716. Its totient is φ = 330033379392.

The previous prime is 661594691939. The next prime is 661594691969. The reversal of 661594691962 is 269196495166.

661594691962 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 542389533841 + 119205158121 = 736471^2 + 345261^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 661594691894 and 661594691903.

It is not an unprimeable number, because it can be changed into a prime (661594691969) 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, 381982213 + ... + 381983944.

Almost surely, 2^661594691962 is an apocalyptic number.

661594691962 is a deficient number, since it is larger than the sum of its proper divisors (333089245754).

661594691962 is a wasteful number, since it uses less digits than its factorization.

661594691962 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763966592.

The product of its digits is 37791360, while the sum is 64.

The spelling of 661594691962 in words is "six hundred sixty-one billion, five hundred ninety-four million, six hundred ninety-one thousand, nine hundred sixty-two".