61263661 has 8 divisors (see below), whose sum is σ = 62326080. Its totient is φ = 60205728.

The previous prime is 61263659. The next prime is 61263667. The reversal of 61263661 is 16636216.

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 61263661 - 2¹ = 61263659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61263667) 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, 37320 + ... + 38926.

It is an arithmetic number, because the mean of its divisors is an integer number (7790760).

Almost surely, 2^61263661 is an apocalyptic number.

It is an amenable number.

61263661 is a deficient number, since it is larger than the sum of its proper divisors (1062419).

61263661 is a wasteful number, since it uses less digits than its factorization.

61263661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2243.

The product of its digits is 7776, while the sum is 31.

The square root of 61263661 is about 7827.1106418652. The cubic root of 61263661 is about 394.2160620192.

Adding to 61263661 its reverse (16636216), we get a palindrome (77899877).

The spelling of 61263661 in words is "sixty-one million, two hundred sixty-three thousand, six hundred sixty-one".