51625666 has 8 divisors (see below), whose sum is σ = 77495040. Its totient is φ = 25793988.

The previous prime is 51625661. The next prime is 51625687. The reversal of 51625666 is 66652615.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (51625661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5706 + ... + 11653.

It is an arithmetic number, because the mean of its divisors is an integer number (9686880).

Almost surely, 2^51625666 is an apocalyptic number.

51625666 is a deficient number, since it is larger than the sum of its proper divisors (25869374).

51625666 is a wasteful number, since it uses less digits than its factorization.

51625666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18848.

The product of its digits is 64800, while the sum is 37.

The square root of 51625666 is about 7185.1002776579. The cubic root of 51625666 is about 372.3533131129.

The spelling of 51625666 in words is "fifty-one million, six hundred twenty-five thousand, six hundred sixty-six".