51660715 has 8 divisors (see below), whose sum is σ = 65255760. Its totient is φ = 39153312.

The previous prime is 51660703. The next prime is 51660727. The reversal of 51660715 is 51706615.

51660715 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51660703) and next prime (51660727).

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

It is a cyclic number.

It is not a de Polignac number, because 51660715 - 2⁵ = 51660683 is a prime.

It is a super-2 number, since 2×51660715² = 5337658948622450, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 271804 + ... + 271993.

It is an arithmetic number, because the mean of its divisors is an integer number (8156970).

Almost surely, 2^51660715 is an apocalyptic number.

51660715 is a deficient number, since it is larger than the sum of its proper divisors (13595045).

51660715 is a wasteful number, since it uses less digits than its factorization.

51660715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543821.

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 51660715 is about 7187.5388694601. The cubic root of 51660715 is about 372.4375584119.

The spelling of 51660715 in words is "fifty-one million, six hundred sixty thousand, seven hundred fifteen".