53916665 has 16 divisors (see below), whose sum is σ = 70856640. Its totient is φ = 39059520.

The previous prime is 53916649. The next prime is 53916671. The reversal of 53916665 is 56661935.

It is not a de Polignac number, because 53916665 - 2⁴ = 53916649 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13466 + ... + 17004.

It is an arithmetic number, because the mean of its divisors is an integer number (4428540).

Almost surely, 2^53916665 is an apocalyptic number.

53916665 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

53916665 is a deficient number, since it is larger than the sum of its proper divisors (16939975).

53916665 is a wasteful number, since it uses less digits than its factorization.

53916665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3832.

The product of its digits is 145800, while the sum is 41.

The square root of 53916665 is about 7342.7968104803. The cubic root of 53916665 is about 377.7817787126.

The spelling of 53916665 in words is "fifty-three million, nine hundred sixteen thousand, six hundred sixty-five".