61661774 has 8 divisors (see below), whose sum is σ = 93390960. Its totient is φ = 30531456.

The previous prime is 61661773. The next prime is 61661777. The reversal of 61661774 is 47716616.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61661773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149459 + ... + 149870.

It is an arithmetic number, because the mean of its divisors is an integer number (11673870).

Almost surely, 2^61661774 is an apocalyptic number.

61661774 is a deficient number, since it is larger than the sum of its proper divisors (31729186).

61661774 is a wasteful number, since it uses less digits than its factorization.

61661774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299434.

The product of its digits is 42336, while the sum is 38.

The square root of 61661774 is about 7852.5011302132. The cubic root of 61661774 is about 395.0681375806.

The spelling of 61661774 in words is "sixty-one million, six hundred sixty-one thousand, seven hundred seventy-four".