66987432 has 32 divisors (see below), whose sum is σ = 186076800. Its totient is φ = 22329072.

The previous prime is 66987343. The next prime is 66987439. The reversal of 66987432 is 23478966.

It is not an unprimeable number, because it can be changed into a prime (66987439) 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, 154848 + ... + 155279.

It is an arithmetic number, because the mean of its divisors is an integer number (5814900).

Almost surely, 2^66987432 is an apocalyptic number.

It is an amenable number.

66987432 is an abundant number, since it is smaller than the sum of its proper divisors (119089368).

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

66987432 is a wasteful number, since it uses less digits than its factorization.

66987432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310142 (or 310132 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 66987432 is about 8184.5850230784. The cubic root of 66987432 is about 406.1294126672.

The spelling of 66987432 in words is "sixty-six million, nine hundred eighty-seven thousand, four hundred thirty-two".