55661653 has 8 divisors (see below), whose sum is σ = 57676248. Its totient is φ = 53673984.

The previous prime is 55661629. The next prime is 55661699. The reversal of 55661653 is 35616655.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2634129 + 53027524 = 1623^2 + 7282^2 .

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 55661653 - 2¹⁷ = 55530581 is a prime.

It is a super-2 number, since 2×55661653² = 6196439229384818, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55662653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2476 + ... + 10837.

It is an arithmetic number, because the mean of its divisors is an integer number (7209531).

Almost surely, 2^55661653 is an apocalyptic number.

It is an amenable number.

55661653 is a deficient number, since it is larger than the sum of its proper divisors (2014595).

55661653 is a wasteful number, since it uses less digits than its factorization.

55661653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13463.

The product of its digits is 81000, while the sum is 37.

The square root of 55661653 is about 7460.6737631396. The cubic root of 55661653 is about 381.8141622318.

The spelling of 55661653 in words is "fifty-five million, six hundred sixty-one thousand, six hundred fifty-three".