61776746 has 4 divisors (see below), whose sum is σ = 92665122. Its totient is φ = 30888372.

The previous prime is 61776727. The next prime is 61776749. The reversal of 61776746 is 64767716.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 61230625 + 546121 = 7825^2 + 739^2 .

It is a junction number, because it is equal to n+sod(n) for n = 61776697 and 61776706.

It is not an unprimeable number, because it can be changed into a prime (61776749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15444185 + ... + 15444188.

Almost surely, 2^61776746 is an apocalyptic number.

61776746 is a deficient number, since it is larger than the sum of its proper divisors (30888376).

61776746 is a wasteful number, since it uses less digits than its factorization.

61776746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30888375.

The product of its digits is 296352, while the sum is 44.

The square root of 61776746 is about 7859.8184457403. The cubic root of 61776746 is about 395.3135277127.

The spelling of 61776746 in words is "sixty-one million, seven hundred seventy-six thousand, seven hundred forty-six".