1066664564 has 36 divisors (see below), whose sum is σ = 2192623776. Its totient is φ = 444770784.

The previous prime is 1066664561. The next prime is 1066664567. The reversal of 1066664564 is 4654666601.

It is an interprime number because it is at equal distance from previous prime (1066664561) and next prime (1066664567).

It is a super-2 number, since 2×1066664564² = 2275546584186620192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066664561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24419 + ... + 52245.

It is an arithmetic number, because the mean of its divisors is an integer number (60906216).

Almost surely, 2^1066664564 is an apocalyptic number.

1066664564 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1066664564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1096311888).

1066664564 is an abundant number, since it is smaller than the sum of its proper divisors (1125959212).

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

1066664564 is a wasteful number, since it uses less digits than its factorization.

1066664564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27912 (or 27873 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 44.

The square root of 1066664564 is about 32659.8310467155. The cubic root of 1066664564 is about 1021.7452384854.

The spelling of 1066664564 in words is "one billion, sixty-six million, six hundred sixty-four thousand, five hundred sixty-four".