51441666 has 16 divisors (see below), whose sum is σ = 104570688. Its totient is φ = 16866000.

The previous prime is 51441661. The next prime is 51441671. The reversal of 51441666 is 66614415.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (51441661) and next prime (51441671).

It is not an unprimeable number, because it can be changed into a prime (51441661) 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, 69910 + ... + 70641.

It is an arithmetic number, because the mean of its divisors is an integer number (6535668).

Almost surely, 2^51441666 is an apocalyptic number.

51441666 is an abundant number, since it is smaller than the sum of its proper divisors (53129022).

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

51441666 is a wasteful number, since it uses less digits than its factorization.

51441666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140617.

The product of its digits is 17280, while the sum is 33.

The square root of 51441666 is about 7172.2845732723. The cubic root of 51441666 is about 371.9104160512.

The spelling of 51441666 in words is "fifty-one million, four hundred forty-one thousand, six hundred sixty-six".