66530441438 has 8 divisors (see below), whose sum is σ = 99848835432. Its totient is φ = 33247496296.

The previous prime is 66530441407. The next prime is 66530441521. The reversal of 66530441438 is 83414403566.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 8857520 + ... + 8865027.

It is an arithmetic number, because the mean of its divisors is an integer number (12481104429).

Almost surely, 2^66530441438 is an apocalyptic number.

66530441438 is a deficient number, since it is larger than the sum of its proper divisors (33318393994).

66530441438 is a wasteful number, since it uses less digits than its factorization.

66530441438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17724426.

The product of its (nonzero) digits is 829440, while the sum is 44.

The spelling of 66530441438 in words is "sixty-six billion, five hundred thirty million, four hundred forty-one thousand, four hundred thirty-eight".