1666065666510 has 96 divisors (see below), whose sum is σ = 5031752536512. Its totient is φ = 374572131840.

The previous prime is 1666065666491. The next prime is 1666065666533. The reversal of 1666065666510 is 156665606661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21638199 + ... + 21715058.

It is an arithmetic number, because the mean of its divisors is an integer number (52414088922).

Almost surely, 2^{1666065666510} is an apocalyptic number.

1666065666510 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1666065666510 is an abundant number, since it is smaller than the sum of its proper divisors (3365686870002).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1666065666510 is a wasteful number, since it uses less digits than its factorization.

1666065666510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43353338 (or 43353335 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 54.

The spelling of 1666065666510 in words is "one trillion, six hundred sixty-six billion, sixty-five million, six hundred sixty-six thousand, five hundred ten".