1665611660010 has 16 divisors (see below), whose sum is σ = 3997467984096. Its totient is φ = 444163109328.

The previous prime is 1665611659967. The next prime is 1665611660023. The reversal of 1665611660010 is 100661165661.

It is a super-2 number, since 2×1665611660010² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27760194304 + ... + 27760194363.

It is an arithmetic number, because the mean of its divisors is an integer number (249841749006).

Almost surely, 2^{1665611660010} is an apocalyptic number.

1665611660010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1665611660010 is an abundant number, since it is smaller than the sum of its proper divisors (2331856324086).

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

1665611660010 is a wasteful number, since it uses less digits than its factorization.

1665611660010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55520388677.

The product of its (nonzero) digits is 38880, while the sum is 39.

The spelling of 1665611660010 in words is "one trillion, six hundred sixty-five billion, six hundred eleven million, six hundred sixty thousand, ten".