130666787 has 4 divisors (see below), whose sum is σ = 130889976. Its totient is φ = 130443600.

The previous prime is 130666763. The next prime is 130666801. The reversal of 130666787 is 787666031.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 787666031 = 8803 ⋅89477.

It is a cyclic number.

It is not a de Polignac number, because 130666787 - 2¹⁸ = 130404643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (130666187) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110714 + ... + 111887.

It is an arithmetic number, because the mean of its divisors is an integer number (32722494).

Almost surely, 2^130666787 is an apocalyptic number.

130666787 is a deficient number, since it is larger than the sum of its proper divisors (223189).

130666787 is an equidigital number, since it uses as much as digits as its factorization.

130666787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223188.

The product of its (nonzero) digits is 254016, while the sum is 44.

The square root of 130666787 is about 11430.9573964738. The cubic root of 130666787 is about 507.4443298395. Note that the first 3 decimals are identical.

The spelling of 130666787 in words is "one hundred thirty million, six hundred sixty-six thousand, seven hundred eighty-seven".