61673277566 has 4 divisors (see below), whose sum is σ = 92509916352. Its totient is φ = 30836638782.

The previous prime is 61673277559. The next prime is 61673277613. The reversal of 61673277566 is 66577237616.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15418319390 + ... + 15418319393.

It is an arithmetic number, because the mean of its divisors is an integer number (23127479088).

Almost surely, 2^61673277566 is an apocalyptic number.

61673277566 is a deficient number, since it is larger than the sum of its proper divisors (30836638786).

61673277566 is a wasteful number, since it uses less digits than its factorization.

61673277566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30836638785.

The product of its digits is 13335840, while the sum is 56.

The spelling of 61673277566 in words is "sixty-one billion, six hundred seventy-three million, two hundred seventy-seven thousand, five hundred sixty-six".