63666741 has 8 divisors (see below), whose sum is σ = 85022784. Its totient is φ = 42377600.

The previous prime is 63666719. The next prime is 63666749. The reversal of 63666741 is 14766636.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 63666741 - 2⁷ = 63666613 is a prime.

It is a super-2 number, since 2×63666741² = 8106907819122162, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 63666741.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63666749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14460 + ... + 18341.

It is an arithmetic number, because the mean of its divisors is an integer number (10627848).

Almost surely, 2^63666741 is an apocalyptic number.

It is an amenable number.

63666741 is a deficient number, since it is larger than the sum of its proper divisors (21356043).

63666741 is a wasteful number, since it uses less digits than its factorization.

63666741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33451.

The product of its digits is 108864, while the sum is 39.

The square root of 63666741 is about 7979.1441270352. The cubic root of 63666741 is about 399.3045018233.

The spelling of 63666741 in words is "sixty-three million, six hundred sixty-six thousand, seven hundred forty-one".