1066656551 has 4 divisors (see below), whose sum is σ = 1129401072. Its totient is φ = 1003912032.

The previous prime is 1066656541. The next prime is 1066656559. The reversal of 1066656551 is 1556566601.

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

It is a cyclic number.

It is not a de Polignac number, because 1066656551 - 2¹⁴ = 1066640167 is a prime.

It is a super-2 number, since 2×1066656551² = 2275512395582431202, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1066656499 and 1066656508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066656559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31372235 + ... + 31372268.

It is an arithmetic number, because the mean of its divisors is an integer number (282350268).

Almost surely, 2^1066656551 is an apocalyptic number.

1066656551 is a deficient number, since it is larger than the sum of its proper divisors (62744521).

1066656551 is an equidigital number, since it uses as much as digits as its factorization.

1066656551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62744520.

The product of its (nonzero) digits is 162000, while the sum is 41.

The square root of 1066656551 is about 32659.7083728560. The cubic root of 1066656551 is about 1021.7426799600.

The spelling of 1066656551 in words is "one billion, sixty-six million, six hundred fifty-six thousand, five hundred fifty-one".