1066698240 has 80 divisors (see below), whose sum is σ = 3410125488. Its totient is φ = 284450816.

The previous prime is 1066698221. The next prime is 1066698257. The reversal of 1066698240 is 428966601.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×1066698240² = 2275690270438195200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1066698192 and 1066698201.

It is a congruent number.

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, 61767 + ... + 77126.

Almost surely, 2^1066698240 is an apocalyptic number.

1066698240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1066698240 is an abundant number, since it is smaller than the sum of its proper divisors (2343427248).

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

1066698240 is an equidigital number, since it uses as much as digits as its factorization.

1066698240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138919 (or 138903 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 1066698240 is about 32660.3465995081. The cubic root of 1066698240 is about 1021.7559909849.

The spelling of 1066698240 in words is "one billion, sixty-six million, six hundred ninety-eight thousand, two hundred forty".