661671731482 has 8 divisors (see below), whose sum is σ = 992520588276. Its totient is φ = 330831535392.

The previous prime is 661671731477. The next prime is 661671731521. The reversal of 661671731482 is 284137176166.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 656195583481 + 5476148001 = 810059^2 + 74001^2 .

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

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, 1970683 + ... + 2281870.

Almost surely, 2^661671731482 is an apocalyptic number.

661671731482 is a deficient number, since it is larger than the sum of its proper divisors (330848856794).

661671731482 is a wasteful number, since it uses less digits than its factorization.

661671731482 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4330352.

The product of its digits is 2032128, while the sum is 52.

The spelling of 661671731482 in words is "six hundred sixty-one billion, six hundred seventy-one million, seven hundred thirty-one thousand, four hundred eighty-two".