51675665 has 16 divisors (see below), whose sum is σ = 66189312. Its totient is φ = 38594304.

The previous prime is 51675653. The next prime is 51675671. The reversal of 51675665 is 56657615.

It is a cyclic number.

It is not a de Polignac number, because 51675665 - 2¹⁰ = 51674641 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8402 + ... + 13188.

It is an arithmetic number, because the mean of its divisors is an integer number (4136832).

Almost surely, 2^51675665 is an apocalyptic number.

It is an amenable number.

51675665 is a deficient number, since it is larger than the sum of its proper divisors (14513647).

51675665 is a wasteful number, since it uses less digits than its factorization.

51675665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4936.

The product of its digits is 189000, while the sum is 41.

The square root of 51675665 is about 7188.5787886063. The cubic root of 51675665 is about 372.4734812886.

The spelling of 51675665 in words is "fifty-one million, six hundred seventy-five thousand, six hundred sixty-five".