1078376000661 has 6 divisors (see below), whose sum is σ = 1557654223190. Its totient is φ = 718917333768.

The previous prime is 1078376000591. The next prime is 1078376000683. The reversal of 1078376000661 is 1660006738701.

1078376000661 is a `hidden beast` number, since 1 + 0 + 7 + 8 + 37 + 600 + 0 + 6 + 6 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 874821631761 + 203554368900 = 935319^2 + 451170^2 .

It is not a de Polignac number, because 1078376000661 - 2¹⁰ = 1078375999637 is a prime.

It is a super-2 number, since 2×1078376000661² (a number of 25 digits) contains 22 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 (1078376000161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 59909777806 + ... + 59909777823.

Almost surely, 2^{1078376000661} is an apocalyptic number.

It is an amenable number.

1078376000661 is a deficient number, since it is larger than the sum of its proper divisors (479278222529).

1078376000661 is a wasteful number, since it uses less digits than its factorization.

1078376000661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119819555635 (or 119819555632 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The spelling of 1078376000661 in words is "one trillion, seventy-eight billion, three hundred seventy-six million, six hundred sixty-one", and thus it is an aban number.