51666258 has 32 divisors (see below), whose sum is σ = 118508544. Its totient is φ = 14710032.

The previous prime is 51666253. The next prime is 51666271. The reversal of 51666258 is 85266615.

It is not an unprimeable number, because it can be changed into a prime (51666253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10891 + ... + 14897.

It is an arithmetic number, because the mean of its divisors is an integer number (3703392).

Almost surely, 2^51666258 is an apocalyptic number.

51666258 is an abundant number, since it is smaller than the sum of its proper divisors (66842286).

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

51666258 is a wasteful number, since it uses less digits than its factorization.

51666258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4326.

The product of its digits is 86400, while the sum is 39.

The square root of 51666258 is about 7187.9244570321. The cubic root of 51666258 is about 372.4508783176.

The spelling of 51666258 in words is "fifty-one million, six hundred sixty-six thousand, two hundred fifty-eight".