51671660 has 24 divisors (see below), whose sum is σ = 108664416. Its totient is φ = 20639360.

The previous prime is 51671611. The next prime is 51671677. The reversal of 51671660 is 6617615.

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, 17705 + ... + 20415.

It is an arithmetic number, because the mean of its divisors is an integer number (4527684).

Almost surely, 2^51671660 is an apocalyptic number.

It is an amenable number.

51671660 is an abundant number, since it is smaller than the sum of its proper divisors (56992756).

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

51671660 is a wasteful number, since it uses less digits than its factorization.

51671660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3673 (or 3671 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 51671660 is about 7188.3002163237. The cubic root of 51671660 is about 372.4638584817.

The spelling of 51671660 in words is "fifty-one million, six hundred seventy-one thousand, six hundred sixty".