66987624 has 32 divisors (see below), whose sum is σ = 182694240. Its totient is φ = 20299200.

The previous prime is 66987623. The next prime is 66987631. The reversal of 66987624 is 42678966.

It is not an unprimeable number, because it can be changed into a prime (66987623) 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, 126607 + ... + 127134.

It is an arithmetic number, because the mean of its divisors is an integer number (5709195).

Almost surely, 2^66987624 is an apocalyptic number.

It is an amenable number.

66987624 is an abundant number, since it is smaller than the sum of its proper divisors (115706616).

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

66987624 is a wasteful number, since it uses less digits than its factorization.

66987624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253761 (or 253757 counting only the distinct ones).

The product of its digits is 870912, while the sum is 48.

The square root of 66987624 is about 8184.5967524369. The cubic root of 66987624 is about 406.1298006841.

The spelling of 66987624 in words is "sixty-six million, nine hundred eighty-seven thousand, six hundred twenty-four".