66055653 has 12 divisors (see below), whose sum is σ = 95485260. Its totient is φ = 44004096.

The previous prime is 66055643. The next prime is 66055663. The reversal of 66055653 is 35655066.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (66055643) and next prime (66055663).

It can be written as a sum of positive squares in 2 ways, for example, as 40985604 + 25070049 = 6402^2 + 5007^2 .

It is not a de Polignac number, because 66055653 - 2¹⁶ = 65990117 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66055603) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18843 + ... + 22071.

It is an arithmetic number, because the mean of its divisors is an integer number (7957105).

Almost surely, 2^66055653 is an apocalyptic number.

It is an amenable number.

66055653 is a deficient number, since it is larger than the sum of its proper divisors (29429607).

66055653 is a wasteful number, since it uses less digits than its factorization.

66055653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5508 (or 5505 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 36.

The square root of 66055653 is about 8127.4628882573. The cubic root of 66055653 is about 404.2375596100.

The spelling of 66055653 in words is "sixty-six million, fifty-five thousand, six hundred fifty-three".