66631524430 has 16 divisors (see below), whose sum is σ = 120123282384. Its totient is φ = 26611156800.

The previous prime is 66631524413. The next prime is 66631524431. The reversal of 66631524430 is 3442513666.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66631524431) 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, 5174871 + ... + 5187730.

It is an arithmetic number, because the mean of its divisors is an integer number (7507705149).

Almost surely, 2^66631524430 is an apocalyptic number.

66631524430 is a deficient number, since it is larger than the sum of its proper divisors (53491757954).

66631524430 is a wasteful number, since it uses less digits than its factorization.

66631524430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10363251.

The product of its (nonzero) digits is 311040, while the sum is 40.

The spelling of 66631524430 in words is "sixty-six billion, six hundred thirty-one million, five hundred twenty-four thousand, four hundred thirty".