1066605551 has 16 divisors (see below), whose sum is σ = 1244235168. Its totient is φ = 903552000.

The previous prime is 1066605539. The next prime is 1066605571. The reversal of 1066605551 is 1555066601.

It is a cyclic number.

It is not a de Polignac number, because 1066605551 - 2¹⁰ = 1066604527 is a prime.

It is a super-2 number, since 2×1066605551² = 2275294802848027202, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066605571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9350 + ... + 47123.

It is an arithmetic number, because the mean of its divisors is an integer number (77764698).

Almost surely, 2^1066605551 is an apocalyptic number.

1066605551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1066605551 is a deficient number, since it is larger than the sum of its proper divisors (177629617).

1066605551 is a wasteful number, since it uses less digits than its factorization.

1066605551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56602.

The product of its (nonzero) digits is 27000, while the sum is 35.

The square root of 1066605551 is about 32658.9275849652. The cubic root of 1066605551 is about 1021.7263955221.

It can be divided in two parts, 106660 and 5551, that added together give a palindrome (112211).

The spelling of 1066605551 in words is "one billion, sixty-six million, six hundred five thousand, five hundred fifty-one".