51666274 has 48 divisors (see below), whose sum is σ = 90091008. Its totient is φ = 22176000.

The previous prime is 51666271. The next prime is 51666283. The reversal of 51666274 is 47266615.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (51666271) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 532594 + ... + 532690.

It is an arithmetic number, because the mean of its divisors is an integer number (1876896).

Almost surely, 2^51666274 is an apocalyptic number.

51666274 is a deficient number, since it is larger than the sum of its proper divisors (38424734).

51666274 is a wasteful number, since it uses less digits than its factorization.

51666274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223 (or 212 counting only the distinct ones).

The product of its digits is 60480, while the sum is 37.

The square root of 51666274 is about 7187.9255700098. The cubic root of 51666274 is about 372.4509167644.

The spelling of 51666274 in words is "fifty-one million, six hundred sixty-six thousand, two hundred seventy-four".