66655030 has 32 divisors (see below), whose sum is σ = 129830400. Its totient is φ = 24492672.

The previous prime is 66654953. The next prime is 66655049. The reversal of 66655030 is 3055666.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 66654983 and 66655001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28651 + ... + 30889.

It is an arithmetic number, because the mean of its divisors is an integer number (4057200).

Almost surely, 2^66655030 is an apocalyptic number.

66655030 is a deficient number, since it is larger than the sum of its proper divisors (63175370).

66655030 is a wasteful number, since it uses less digits than its factorization.

66655030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2488.

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 66655030 is about 8164.2531807876. The cubic root of 66655030 is about 405.4565394797.

It can be divided in two parts, 666 and 55030, that added together give a square (55696 = 236²).

The spelling of 66655030 in words is "sixty-six million, six hundred fifty-five thousand, thirty".