63427661 has 8 divisors (see below), whose sum is σ = 69660000. Its totient is φ = 57273040.

The previous prime is 63427633. The next prime is 63427673. The reversal of 63427661 is 16672436.

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

It is not a de Polignac number, because 63427661 - 2⁶ = 63427597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63027661) 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, 17711 + ... + 20988.

It is an arithmetic number, because the mean of its divisors is an integer number (8707500).

Almost surely, 2^63427661 is an apocalyptic number.

It is an amenable number.

63427661 is a deficient number, since it is larger than the sum of its proper divisors (6232339).

63427661 is a wasteful number, since it uses less digits than its factorization.

63427661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38859.

The product of its digits is 36288, while the sum is 35.

The square root of 63427661 is about 7964.1484792789. The cubic root of 63427661 is about 398.8040549355.

It can be divided in two parts, 63 and 427661, that added together give a palindrome (427724).

The spelling of 63427661 in words is "sixty-three million, four hundred twenty-seven thousand, six hundred sixty-one".