1066630398 has 32 divisors (see below), whose sum is σ = 2250758400. Its totient is φ = 336047616.

The previous prime is 1066630393. The next prime is 1066630399. The reversal of 1066630398 is 8930366601.

It is a super-2 number, since 2×1066630398² = 2275400811875276808, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066630393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39390 + ... + 60702.

It is an arithmetic number, because the mean of its divisors is an integer number (70336200).

Almost surely, 2^1066630398 is an apocalyptic number.

1066630398 is an abundant number, since it is smaller than the sum of its proper divisors (1184128002).

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

1066630398 is a wasteful number, since it uses less digits than its factorization.

1066630398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21776.

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 1066630398 is about 32659.3079840954. The cubic root of 1066630398 is about 1021.7343293012.

Adding to 1066630398 its reverse (8930366601), we get a palindrome (9996996999).

The spelling of 1066630398 in words is "one billion, sixty-six million, six hundred thirty thousand, three hundred ninety-eight".