2520866387 has 8 divisors (see below), whose sum is σ = 2715891360. Its totient is φ = 2326000320.

The previous prime is 2520866371. The next prime is 2520866399. The reversal of 2520866387 is 7836680252.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2520866387 - 2⁴ = 2520866371 is a prime.

It is a super-2 number, since 2×2520866387² = 12709534682212867538, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2520866317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5687 + ... + 71232.

It is an arithmetic number, because the mean of its divisors is an integer number (339486420).

Almost surely, 2^2520866387 is an apocalyptic number.

2520866387 is a deficient number, since it is larger than the sum of its proper divisors (195024973).

2520866387 is a wasteful number, since it uses less digits than its factorization.

2520866387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79453.

The product of its (nonzero) digits is 967680, while the sum is 47.

The square root of 2520866387 is about 50208.2302715401. The cubic root of 2520866387 is about 1360.9743570931.

The spelling of 2520866387 in words is "two billion, five hundred twenty million, eight hundred sixty-six thousand, three hundred eighty-seven".