53620661 has 4 divisors (see below), whose sum is σ = 54928524. Its totient is φ = 52312800.

The previous prime is 53620639. The next prime is 53620663. The reversal of 53620661 is 16602635.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3352561 + 50268100 = 1831^2 + 7090^2 .

It is a cyclic number.

It is not a de Polignac number, because 53620661 - 2²² = 49426357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53620663) 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, 653870 + ... + 653951.

It is an arithmetic number, because the mean of its divisors is an integer number (13732131).

Almost surely, 2^53620661 is an apocalyptic number.

It is an amenable number.

53620661 is a deficient number, since it is larger than the sum of its proper divisors (1307863).

53620661 is a wasteful number, since it uses less digits than its factorization.

53620661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1307862.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 53620661 is about 7322.6129899101. The cubic root of 53620661 is about 377.0891654935.

The spelling of 53620661 in words is "fifty-three million, six hundred twenty thousand, six hundred sixty-one".