1166661066015 has 24 divisors (see below), whose sum is σ = 2031796476528. Its totient is φ = 619270323840.

The previous prime is 1166661065953. The next prime is 1166661066029. The reversal of 1166661066015 is 5106601666611.

It is not a de Polignac number, because 1166661066015 - 2⁶ = 1166661065951 is a prime.

It is a super-2 number, since 2×1166661066015² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61426054 + ... + 61445043.

It is an arithmetic number, because the mean of its divisors is an integer number (84658186522).

Almost surely, 2^{1166661066015} is an apocalyptic number.

1166661066015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1166661066015 is a deficient number, since it is larger than the sum of its proper divisors (865135410513).

1166661066015 is a wasteful number, since it uses less digits than its factorization.

1166661066015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122871319 (or 122871316 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The spelling of 1166661066015 in words is "one trillion, one hundred sixty-six billion, six hundred sixty-one million, sixty-six thousand, fifteen".