66241256404 has 12 divisors (see below), whose sum is σ = 122023367200. Its totient is φ = 31377437208.

The previous prime is 66241256353. The next prime is 66241256479. The reversal of 66241256404 is 40465214266.

It is a happy number.

It is a super-2 number, since 2×66241256404² (a number of 22 digits) contains 22 as substring.

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, 435797664 + ... + 435797815.

Almost surely, 2^66241256404 is an apocalyptic number.

It is an amenable number.

66241256404 is a deficient number, since it is larger than the sum of its proper divisors (55782110796).

66241256404 is a wasteful number, since it uses less digits than its factorization.

66241256404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871595502 (or 871595500 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 40.

The spelling of 66241256404 in words is "sixty-six billion, two hundred forty-one million, two hundred fifty-six thousand, four hundred four".