1077561666 has 12 divisors (see below), whose sum is σ = 2334716982. Its totient is φ = 359187216.

The previous prime is 1077561637. The next prime is 1077561673. The reversal of 1077561666 is 6661657701.

It can be written as a sum of positive squares in only one way, i.e., 722050641 + 355511025 = 26871^2 + 18855^2 .

It is a super-2 number, since 2×1077561666² = 2322278288065391112, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29932251 + ... + 29932286.

Almost surely, 2^1077561666 is an apocalyptic number.

1077561666 is an abundant number, since it is smaller than the sum of its proper divisors (1257155316).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1077561666 is a wasteful number, since it uses less digits than its factorization.

1077561666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59864545 (or 59864542 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The square root of 1077561666 is about 32826.2344170025. The cubic root of 1077561666 is about 1025.2128579549.

The spelling of 1077561666 in words is "one billion, seventy-seven million, five hundred sixty-one thousand, six hundred sixty-six".