1066262440 has 32 divisors (see below), whose sum is σ = 2540215080. Its totient is φ = 401416192.

The previous prime is 1066262437. The next prime is 1066262473. The reversal of 1066262440 is 442626601.

It can be written as a sum of positive squares in 4 ways, for example, as 1062629604 + 3632836 = 32598^2 + 1906^2 .

It is a super-2 number, since 2×1066262440² = 2273831181909507200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 783337 + ... + 784696.

Almost surely, 2^1066262440 is an apocalyptic number.

1066262440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1066262440 is an abundant number, since it is smaller than the sum of its proper divisors (1473952640).

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

1066262440 is a wasteful number, since it uses less digits than its factorization.

1066262440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1568061 (or 1568057 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 1066262440 is about 32653.6742189910. The cubic root of 1066262440 is about 1021.6168257559.

The spelling of 1066262440 in words is "one billion, sixty-six million, two hundred sixty-two thousand, four hundred forty".