2506166890 has 8 divisors (see below), whose sum is σ = 4511100420. Its totient is φ = 1002466752.

The previous prime is 2506166881. The next prime is 2506166903. The reversal of 2506166890 is 986616052.

It can be written as a sum of positive squares in 2 ways, for example, as 2492705329 + 13461561 = 49927^2 + 3669^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125308335 + ... + 125308354.

Almost surely, 2^2506166890 is an apocalyptic number.

2506166890 is a deficient number, since it is larger than the sum of its proper divisors (2004933530).

2506166890 is a wasteful number, since it uses less digits than its factorization.

2506166890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250616696.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 2506166890 is about 50061.6309163016. The cubic root of 2506166890 is about 1358.3238596033.

The spelling of 2506166890 in words is "two billion, five hundred six million, one hundred sixty-six thousand, eight hundred ninety".