51660466 has 24 divisors (see below), whose sum is σ = 91733292. Its totient is φ = 21674400.

The previous prime is 51660463. The next prime is 51660481. The reversal of 51660466 is 66406615.

It can be written as a sum of positive squares in 2 ways, for example, as 38081241 + 13579225 = 6171^2 + 3685^2 .

It is not an unprimeable number, because it can be changed into a prime (51660463) 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 11 ways as a sum of consecutive naturals, for example, 5065 + ... + 11356.

Almost surely, 2^51660466 is an apocalyptic number.

51660466 is a deficient number, since it is larger than the sum of its proper divisors (40072826).

51660466 is a wasteful number, since it uses less digits than its factorization.

51660466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16458 (or 16447 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 51660466 is about 7187.5215477938. The cubic root of 51660466 is about 372.4369600391.

The spelling of 51660466 in words is "fifty-one million, six hundred sixty thousand, four hundred sixty-six".