77724061 has 8 divisors (see below), whose sum is σ = 81195264. Its totient is φ = 74260560.

The previous prime is 77724047. The next prime is 77724067. The reversal of 77724061 is 16042777.

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

It is not a de Polignac number, because 77724061 - 2⁵ = 77724029 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 (77724067) 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, 30540 + ... + 32986.

It is an arithmetic number, because the mean of its divisors is an integer number (10149408).

Almost surely, 2^77724061 is an apocalyptic number.

It is an amenable number.

77724061 is a deficient number, since it is larger than the sum of its proper divisors (3471203).

77724061 is a wasteful number, since it uses less digits than its factorization.

77724061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3851.

The product of its (nonzero) digits is 16464, while the sum is 34.

The square root of 77724061 is about 8816.1250558281. The cubic root of 77724061 is about 426.7614296216.

The spelling of 77724061 in words is "seventy-seven million, seven hundred twenty-four thousand, sixty-one".