53646665 has 16 divisors (see below), whose sum is σ = 66830400. Its totient is φ = 41291712.

The previous prime is 53646661. The next prime is 53646673. The reversal of 53646665 is 56664635.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 53646665 - 2² = 53646661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53646661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60314 + ... + 61196.

It is an arithmetic number, because the mean of its divisors is an integer number (4176900).

Almost surely, 2^53646665 is an apocalyptic number.

It is an amenable number.

53646665 is a deficient number, since it is larger than the sum of its proper divisors (13183735).

53646665 is a wasteful number, since it uses less digits than its factorization.

53646665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1336.

The product of its digits is 388800, while the sum is 41.

The square root of 53646665 is about 7324.3883703692. The cubic root of 53646665 is about 377.1501136539.

The spelling of 53646665 in words is "fifty-three million, six hundred forty-six thousand, six hundred sixty-five".