661074106474 has 8 divisors (see below), whose sum is σ = 1007867080548. Its totient is φ = 325118412960.

The previous prime is 661074106463. The next prime is 661074106481. The reversal of 661074106474 is 474601470166.

661074106474 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 479150530849 + 181923575625 = 692207^2 + 426525^2 .

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

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, 2709319987 + ... + 2709320230.

Almost surely, 2^661074106474 is an apocalyptic number.

661074106474 is a deficient number, since it is larger than the sum of its proper divisors (346792974074).

661074106474 is a wasteful number, since it uses less digits than its factorization.

661074106474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5418640280.

The product of its (nonzero) digits is 677376, while the sum is 46.

The spelling of 661074106474 in words is "six hundred sixty-one billion, seventy-four million, one hundred six thousand, four hundred seventy-four".