66261447410 has 32 divisors (see below), whose sum is σ = 125100426240. Its totient is φ = 25239546432.

The previous prime is 66261447407. The next prime is 66261447437. The reversal of 66261447410 is 1474416266.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1887770 + ... + 1922549.

It is an arithmetic number, because the mean of its divisors is an integer number (3909388320).

Almost surely, 2^66261447410 is an apocalyptic number.

66261447410 is a deficient number, since it is larger than the sum of its proper divisors (58838978830).

66261447410 is a wasteful number, since it uses less digits than its factorization.

66261447410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3810410.

The product of its (nonzero) digits is 193536, while the sum is 41.

The spelling of 66261447410 in words is "sixty-six billion, two hundred sixty-one million, four hundred forty-seven thousand, four hundred ten".