130666440 has 64 divisors (see below), whose sum is σ = 393514560. Its totient is φ = 34709760.

The previous prime is 130666429. The next prime is 130666447. The reversal of 130666440 is 44666031.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 130666398 and 130666407.

It is not an unprimeable number, because it can be changed into a prime (130666447) 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, 31275 + ... + 35205.

It is an arithmetic number, because the mean of its divisors is an integer number (6148665).

Almost surely, 2^130666440 is an apocalyptic number.

130666440 is a gapful number since it is divisible by the number (10) 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 130666440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196757280).

130666440 is an abundant number, since it is smaller than the sum of its proper divisors (262848120).

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

130666440 is a wasteful number, since it uses less digits than its factorization.

130666440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4222 (or 4218 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 130666440 is about 11430.9422183825. The cubic root of 130666440 is about 507.4438806477.

The spelling of 130666440 in words is "one hundred thirty million, six hundred sixty-six thousand, four hundred forty".