61677773 has 8 divisors (see below), whose sum is σ = 63084408. Its totient is φ = 60286464.

The previous prime is 61677769. The next prime is 61677793. The reversal of 61677773 is 37777616.

61677773 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 8868484 + 52809289 = 2978^2 + 7267^2 .

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 61677773 - 2² = 61677769 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 (61677793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4511 + ... + 11987.

It is an arithmetic number, because the mean of its divisors is an integer number (7885551).

Almost surely, 2^61677773 is an apocalyptic number.

It is an amenable number.

61677773 is a deficient number, since it is larger than the sum of its proper divisors (1406635).

61677773 is a wasteful number, since it uses less digits than its factorization.

61677773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7663.

The product of its digits is 259308, while the sum is 44.

The square root of 61677773 is about 7853.5197841477. The cubic root of 61677773 is about 395.1023032565.

The spelling of 61677773 in words is "sixty-one million, six hundred seventy-seven thousand, seven hundred seventy-three".