61003664 has 10 divisors (see below), whose sum is σ = 118194630. Its totient is φ = 30501824.

The previous prime is 61003651. The next prime is 61003673. The reversal of 61003664 is 46630016.

61003664 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 only one way, i.e., 43296400 + 17707264 = 6580^2 + 4208^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1906349 + ... + 1906380.

It is an arithmetic number, because the mean of its divisors is an integer number (11819463).

Almost surely, 2^61003664 is an apocalyptic number.

It is an amenable number.

61003664 is a deficient number, since it is larger than the sum of its proper divisors (57190966).

61003664 is a wasteful number, since it uses less digits than its factorization.

61003664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3812737 (or 3812731 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 61003664 is about 7810.4842359485. The cubic root of 61003664 is about 393.6575997511.

The spelling of 61003664 in words is "sixty-one million, three thousand, six hundred sixty-four".