2891066520 has 32 divisors (see below), whose sum is σ = 8673199920. Its totient is φ = 770951040.

The previous prime is 2891066509. The next prime is 2891066531. The reversal of 2891066520 is 256601982.

It is an interprime number because it is at equal distance from previous prime (2891066509) and next prime (2891066531).

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 12045991 + ... + 12046230.

Almost surely, 2^2891066520 is an apocalyptic number.

2891066520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2891066520 is an abundant number, since it is smaller than the sum of its proper divisors (5782133400).

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

2891066520 is a wasteful number, since it uses less digits than its factorization.

2891066520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24092235 (or 24092231 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 2891066520 is about 53768.6388148333. The cubic root of 2891066520 is about 1424.5773273972.

The spelling of 2891066520 in words is "two billion, eight hundred ninety-one million, sixty-six thousand, five hundred twenty".