1666486583577 has 48 divisors (see below), whose sum is σ = 2427594624000. Its totient is φ = 1101598744320.

The previous prime is 1666486583563. The next prime is 1666486583579. The reversal of 1666486583577 is 7753856846661.

It is a happy number.

It is not a de Polignac number, because 1666486583577 - 2¹² = 1666486579481 is a prime.

It is a super-2 number, since 2×1666486583577² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1666486583579) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1116199243 + ... + 1116200735.

It is an arithmetic number, because the mean of its divisors is an integer number (50574888000).

Almost surely, 2^{1666486583577} is an apocalyptic number.

It is an amenable number.

1666486583577 is a deficient number, since it is larger than the sum of its proper divisors (761108040423).

1666486583577 is a wasteful number, since it uses less digits than its factorization.

1666486583577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3358 (or 3355 counting only the distinct ones).

The product of its digits is 1219276800, while the sum is 72.

The spelling of 1666486583577 in words is "one trillion, six hundred sixty-six billion, four hundred eighty-six million, five hundred eighty-three thousand, five hundred seventy-seven".