666101145 has 64 divisors (see below), whose sum is σ = 1175731200. Its totient is φ = 320705280.

The previous prime is 666101143. The next prime is 666101153. The reversal of 666101145 is 541101666.

It is not a de Polignac number, because 666101145 - 2¹ = 666101143 is a prime.

It is a super-2 number, since 2×666101145² = 887381470740622050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (666101143) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 685510 + ... + 686480.

It is an arithmetic number, because the mean of its divisors is an integer number (18370800).

Almost surely, 2^666101145 is an apocalyptic number.

It is an amenable number.

666101145 is a deficient number, since it is larger than the sum of its proper divisors (509630055).

666101145 is a wasteful number, since it uses less digits than its factorization.

666101145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 666101145 is about 25808.9353713012. The cubic root of 666101145 is about 873.3333805172. Note that the first 4 decimals are identical.

The spelling of 666101145 in words is "six hundred sixty-six million, one hundred one thousand, one hundred forty-five".