61673751 has 8 divisors (see below), whose sum is σ = 91368560. Its totient is φ = 41115816.

The previous prime is 61673747. The next prime is 61673761. The reversal of 61673751 is 15737616.

61673751 is a `hidden beast` number, since 616 + 7 + 37 + 5 + 1 = 666.

61673751 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61673751 - 2² = 61673747 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 (61673761) 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, 1142080 + ... + 1142133.

It is an arithmetic number, because the mean of its divisors is an integer number (11421070).

Almost surely, 2^61673751 is an apocalyptic number.

61673751 is a deficient number, since it is larger than the sum of its proper divisors (29694809).

61673751 is a wasteful number, since it uses less digits than its factorization.

61673751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2284222 (or 2284216 counting only the distinct ones).

The product of its digits is 26460, while the sum is 36.

The square root of 61673751 is about 7853.2637164430. The cubic root of 61673751 is about 395.0937148789.

The spelling of 61673751 in words is "sixty-one million, six hundred seventy-three thousand, seven hundred fifty-one".