1066644051 has 32 divisors (see below), whose sum is σ = 1575611136. Its totient is φ = 636480000.

The previous prime is 1066644049. The next prime is 1066644053. The reversal of 1066644051 is 1504466601.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1066644049) and next prime (1066644053).

It is not a de Polignac number, because 1066644051 - 2¹ = 1066644049 is a prime.

It is a super-2 number, since 2×1066644051² = 2275459063067381202, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (1066644053) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 591351 + ... + 593151.

It is an arithmetic number, because the mean of its divisors is an integer number (49237848).

Almost surely, 2^1066644051 is an apocalyptic number.

1066644051 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1066644051 is a deficient number, since it is larger than the sum of its proper divisors (508967085).

1066644051 is a wasteful number, since it uses less digits than its factorization.

1066644051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2083.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 1066644051 is about 32659.5170050018. The cubic root of 1066644051 is about 1021.7386887242.

The spelling of 1066644051 in words is "one billion, sixty-six million, six hundred forty-four thousand, fifty-one".