666166110 has 16 divisors (see below), whose sum is σ = 1598798736. Its totient is φ = 177644288.

The previous prime is 666166069. The next prime is 666166121. The reversal of 666166110 is 11661666.

It is a super-2 number, since 2×666166110² = 887554572225064200, which contains 22 as substring.

It is a congruent number.

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, 11102739 + ... + 11102798.

It is an arithmetic number, because the mean of its divisors is an integer number (99924921).

Almost surely, 2^666166110 is an apocalyptic number.

666166110 is an abundant number, since it is smaller than the sum of its proper divisors (932632626).

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

666166110 is a wasteful number, since it uses less digits than its factorization.

666166110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22205547.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 666166110 is about 25810.1939163579. The cubic root of 666166110 is about 873.3617717303.

It can be divided in two parts, 6661 and 66110, that added together give a triangular number (72771 = T₃₈₁).

The spelling of 666166110 in words is "six hundred sixty-six million, one hundred sixty-six thousand, one hundred ten".