57661058566 has 4 divisors (see below), whose sum is σ = 86491587852. Its totient is φ = 28830529282.

The previous prime is 57661058531. The next prime is 57661058579. The reversal of 57661058566 is 66585016675.

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 polite number, since it can be written as a sum of consecutive naturals, namely, 14415264640 + ... + 14415264643.

It is an arithmetic number, because the mean of its divisors is an integer number (21622896963).

Almost surely, 2^57661058566 is an apocalyptic number.

57661058566 is a deficient number, since it is larger than the sum of its proper divisors (28830529286).

57661058566 is a wasteful number, since it uses less digits than its factorization.

57661058566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28830529285.

The product of its (nonzero) digits is 9072000, while the sum is 55.

The spelling of 57661058566 in words is "fifty-seven billion, six hundred sixty-one million, fifty-eight thousand, five hundred sixty-six".