1061551566 has 12 divisors (see below), whose sum is σ = 2300028432. Its totient is φ = 353850516.

The previous prime is 1061551529. The next prime is 1061551609. The reversal of 1061551566 is 6651551601.

It is a super-2 number, since 2×1061551566² = 2253783454554104712, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1061551566.

It is a congruent number.

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, 29487526 + ... + 29487561.

It is an arithmetic number, because the mean of its divisors is an integer number (191669036).

Almost surely, 2^1061551566 is an apocalyptic number.

1061551566 is an abundant number, since it is smaller than the sum of its proper divisors (1238476866).

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

1061551566 is a wasteful number, since it uses less digits than its factorization.

1061551566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58975095 (or 58975092 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The square root of 1061551566 is about 32581.4604645034. The cubic root of 1061551566 is about 1020.1100630944.

The spelling of 1061551566 in words is "one billion, sixty-one million, five hundred fifty-one thousand, five hundred sixty-six".