51669580 has 24 divisors (see below), whose sum is σ = 109584720. Its totient is φ = 20462400.

The previous prime is 51669577. The next prime is 51669581. The reversal of 51669580 is 8596615.

It is not an unprimeable number, because it can be changed into a prime (51669581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10770 + ... + 14809.

It is an arithmetic number, because the mean of its divisors is an integer number (4566030).

Almost surely, 2^51669580 is an apocalyptic number.

It is an amenable number.

51669580 is an abundant number, since it is smaller than the sum of its proper divisors (57915140).

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

51669580 is a wasteful number, since it uses less digits than its factorization.

51669580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25689 (or 25687 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 40.

The square root of 51669580 is about 7188.1555353234. The cubic root of 51669580 is about 372.4588606730.

The spelling of 51669580 in words is "fifty-one million, six hundred sixty-nine thousand, five hundred eighty".