66611632 has 40 divisors (see below), whose sum is σ = 131991552. Its totient is φ = 32558400.

The previous prime is 66611617. The next prime is 66611639. The reversal of 66611632 is 23611666.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 66611594 and 66611603.

It is not an unprimeable number, because it can be changed into a prime (66611639) 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, 216823 + ... + 217129.

Almost surely, 2^66611632 is an apocalyptic number.

It is an amenable number.

66611632 is a deficient number, since it is larger than the sum of its proper divisors (65379920).

66611632 is a wasteful number, since it uses less digits than its factorization.

66611632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577 (or 571 counting only the distinct ones).

The product of its digits is 7776, while the sum is 31.

The square root of 66611632 is about 8161.5949421666. The cubic root of 66611632 is about 405.3685250012.

The spelling of 66611632 in words is "sixty-six million, six hundred eleven thousand, six hundred thirty-two".