661051682 has 8 divisors (see below), whose sum is σ = 993321900. Its totient is φ = 329944384.

The previous prime is 661051661. The next prime is 661051711. The reversal of 661051682 is 286150166.

It is a happy number.

661051682 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

661051682 is an esthetic number in base 5, because in such base its adjacent digits differ by 1.

It can be written as a sum of positive squares in 2 ways, for example, as 488365801 + 172685881 = 22099^2 + 13141^2 .

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, 289307 + ... + 291582.

Almost surely, 2^661051682 is an apocalyptic number.

661051682 is a deficient number, since it is larger than the sum of its proper divisors (332270218).

661051682 is a wasteful number, since it uses less digits than its factorization.

661051682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581460.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 661051682 is about 25710.9253431299. The cubic root of 661051682 is about 871.1209763056.

The spelling of 661051682 in words is "six hundred sixty-one million, fifty-one thousand, six hundred eighty-two".