51666454 has 16 divisors (see below), whose sum is σ = 88690176. Its totient is φ = 22113000.

The previous prime is 51666443. The next prime is 51666463. The reversal of 51666454 is 45466615.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10729 + ... + 14779.

It is an arithmetic number, because the mean of its divisors is an integer number (5543136).

Almost surely, 2^51666454 is an apocalyptic number.

51666454 is a deficient number, since it is larger than the sum of its proper divisors (37023722).

51666454 is a wasteful number, since it uses less digits than its factorization.

51666454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4971.

The product of its digits is 86400, while the sum is 37.

The square root of 51666454 is about 7187.9380909966. The cubic root of 51666454 is about 372.4513492908.

The spelling of 51666454 in words is "fifty-one million, six hundred sixty-six thousand, four hundred fifty-four".