66626432 has 32 divisors (see below), whose sum is σ = 133236480. Its totient is φ = 33186816.

The previous prime is 66626431. The next prime is 66626437. The reversal of 66626432 is 23462666.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 66626392 and 66626401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66626431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39233 + ... + 40895.

It is an arithmetic number, because the mean of its divisors is an integer number (4163640).

Almost surely, 2^66626432 is an apocalyptic number.

It is an amenable number.

66626432 is a deficient number, since it is larger than the sum of its proper divisors (66610048).

66626432 is a wasteful number, since it uses less digits than its factorization.

66626432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1990 (or 1978 counting only the distinct ones).

The product of its digits is 62208, while the sum is 35.

The square root of 66626432 is about 8162.5015773352. The cubic root of 66626432 is about 405.3985448327.

The spelling of 66626432 in words is "sixty-six million, six hundred twenty-six thousand, four hundred thirty-two".