66535215542 has 8 divisors (see below), whose sum is σ = 102123819336. Its totient is φ = 32493942432.

The previous prime is 66535215449. The next prime is 66535215563. The reversal of 66535215542 is 24551253566.

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

It is a junction number, because it is equal to n+sod(n) for n = 66535215493 and 66535215502.

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, 386832563 + ... + 386832734.

It is an arithmetic number, because the mean of its divisors is an integer number (12765477417).

Almost surely, 2^66535215542 is an apocalyptic number.

66535215542 is a deficient number, since it is larger than the sum of its proper divisors (35588603794).

66535215542 is a wasteful number, since it uses less digits than its factorization.

66535215542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773665342.

The product of its digits is 1080000, while the sum is 44.

The spelling of 66535215542 in words is "sixty-six billion, five hundred thirty-five million, two hundred fifteen thousand, five hundred forty-two".