66614652 has 72 divisors (see below), whose sum is σ = 186289376. Its totient is φ = 19937664.

The previous prime is 66614633. The next prime is 66614699. The reversal of 66614652 is 25641666.

It is a happy number.

It is a super-2 number, since 2×66614652² = 8875023722162208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15393 + ... + 19239.

Almost surely, 2^66614652 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66614652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93144688).

66614652 is an abundant number, since it is smaller than the sum of its proper divisors (119674724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66614652 is a wasteful number, since it uses less digits than its factorization.

66614652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3907 (or 3902 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 66614652 is about 8161.7799529269. The cubic root of 66614652 is about 405.3746510306.

The spelling of 66614652 in words is "sixty-six million, six hundred fourteen thousand, six hundred fifty-two".