1061566378 has 4 divisors (see below), whose sum is σ = 1592349570. Its totient is φ = 530783188.

The previous prime is 1061566321. The next prime is 1061566379. The reversal of 1061566378 is 8736651601.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 953759689 + 107806689 = 30883^2 + 10383^2 .

It is a super-2 number, since 2×1061566378² = 2253846349800077768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1061566379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265391593 + ... + 265391596.

Almost surely, 2^1061566378 is an apocalyptic number.

1061566378 is a deficient number, since it is larger than the sum of its proper divisors (530783192).

1061566378 is an equidigital number, since it uses as much as digits as its factorization.

1061566378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530783191.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 1061566378 is about 32581.6877708936. The cubic root of 1061566378 is about 1020.1148076590.

The spelling of 1061566378 in words is "one billion, sixty-one million, five hundred sixty-six thousand, three hundred seventy-eight".