66651632 has 20 divisors (see below), whose sum is σ = 130158336. Its totient is φ = 33062400.

The previous prime is 66651623. The next prime is 66651653. The reversal of 66651632 is 23615666.

It is a junction number, because it is equal to n+sod(n) for n = 66651592 and 66651601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14369 + ... + 18432.

Almost surely, 2^66651632 is an apocalyptic number.

It is an amenable number.

66651632 is a deficient number, since it is larger than the sum of its proper divisors (63506704).

66651632 is a wasteful number, since it uses less digits than its factorization.

66651632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32936 (or 32930 counting only the distinct ones).

The product of its digits is 38880, while the sum is 35.

The square root of 66651632 is about 8164.0450758187. The cubic root of 66651632 is about 405.4496494534.

The spelling of 66651632 in words is "sixty-six million, six hundred fifty-one thousand, six hundred thirty-two".