61666715621048 has 32 divisors (see below), whose sum is σ = 116131187592000. Its totient is φ = 30698448506880.

The previous prime is 61666715621029. The next prime is 61666715621107. The reversal of 61666715621048 is 84012651766616.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6863768 + ... + 13055448.

It is an arithmetic number, because the mean of its divisors is an integer number (3629099612250).

Almost surely, 2^{61666715621048} is an apocalyptic number.

It is an amenable number.

61666715621048 is a deficient number, since it is larger than the sum of its proper divisors (54464471970952).

61666715621048 is a wasteful number, since it uses less digits than its factorization.

61666715621048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6197135 (or 6197131 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 59.

The spelling of 61666715621048 in words is "sixty-one trillion, six hundred sixty-six billion, seven hundred fifteen million, six hundred twenty-one thousand, forty-eight".