61220761 has 8 divisors (see below), whose sum is σ = 70041024. Its totient is φ = 52419120.

The previous prime is 61220729. The next prime is 61220771. The reversal of 61220761 is 16702216.

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 61220761 - 2⁵ = 61220729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61220771) 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, 3306 + ... + 11548.

It is an arithmetic number, because the mean of its divisors is an integer number (8755128).

Almost surely, 2^61220761 is an apocalyptic number.

It is an amenable number.

61220761 is a deficient number, since it is larger than the sum of its proper divisors (8820263).

61220761 is a wasteful number, since it uses less digits than its factorization.

61220761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9311.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 61220761 is about 7824.3696870738. The cubic root of 61220761 is about 394.1240236730.

Adding to 61220761 its reverse (16702216), we get a palindrome (77922977).

The spelling of 61220761 in words is "sixty-one million, two hundred twenty thousand, seven hundred sixty-one".