61003966 has 4 divisors (see below), whose sum is σ = 91505952. Its totient is φ = 30501982.

The previous prime is 61003963. The next prime is 61003967. The reversal of 61003966 is 66930016.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61003961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15250990 + ... + 15250993.

It is an arithmetic number, because the mean of its divisors is an integer number (22876488).

Almost surely, 2^61003966 is an apocalyptic number.

61003966 is a deficient number, since it is larger than the sum of its proper divisors (30501986).

61003966 is a wasteful number, since it uses less digits than its factorization.

61003966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30501985.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 61003966 is about 7810.5035689128. The cubic root of 61003966 is about 393.6582493537.

The spelling of 61003966 in words is "sixty-one million, three thousand, nine hundred sixty-six".