1066501551 has 4 divisors (see below), whose sum is σ = 1422002072. Its totient is φ = 711001032.

The previous prime is 1066501549. The next prime is 1066501567. The reversal of 1066501551 is 1551056601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1551056601 = 3 ⋅517018867.

It is not a de Polignac number, because 1066501551 - 2¹ = 1066501549 is a prime.

It is a super-2 number, since 2×1066501551² = 2274851116570811202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066501531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177750256 + ... + 177750261.

It is an arithmetic number, because the mean of its divisors is an integer number (355500518).

Almost surely, 2^1066501551 is an apocalyptic number.

1066501551 is a deficient number, since it is larger than the sum of its proper divisors (355500521).

1066501551 is an equidigital number, since it uses as much as digits as its factorization.

1066501551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355500520.

The product of its (nonzero) digits is 4500, while the sum is 30.

The square root of 1066501551 is about 32657.3353322037. The cubic root of 1066501551 is about 1021.6931864322.

The spelling of 1066501551 in words is "one billion, sixty-six million, five hundred one thousand, five hundred fifty-one".