166665057610 has 8 divisors (see below), whose sum is σ = 299997103716. Its totient is φ = 66666023040.

The previous prime is 166665057583. The next prime is 166665057617. The reversal of 166665057610 is 16750566661.

It can be written as a sum of positive squares in 2 ways, for example, as 163532080881 + 3132976729 = 404391^2 + 55973^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (166665057617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8333252871 + ... + 8333252890.

Almost surely, 2^166665057610 is an apocalyptic number.

166665057610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166665057610 is a deficient number, since it is larger than the sum of its proper divisors (133332046106).

166665057610 is a wasteful number, since it uses less digits than its factorization.

166665057610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16666505768.

The product of its (nonzero) digits is 1360800, while the sum is 49.

The spelling of 166665057610 in words is "one hundred sixty-six billion, six hundred sixty-five million, fifty-seven thousand, six hundred ten".