66011145 has 32 divisors (see below), whose sum is σ = 109855872. Its totient is φ = 33818112.

The previous prime is 66011137. The next prime is 66011161. The reversal of 66011145 is 54111066.

It is not a de Polignac number, because 66011145 - 2³ = 66011137 is a prime.

It is a super-2 number, since 2×66011145² = 8714942528422050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45349 + ... + 46781.

It is an arithmetic number, because the mean of its divisors is an integer number (3432996).

Almost surely, 2^66011145 is an apocalyptic number.

It is an amenable number.

66011145 is a deficient number, since it is larger than the sum of its proper divisors (43844727).

66011145 is a wasteful number, since it uses less digits than its factorization.

66011145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 66011145 is about 8124.7243030148. The cubic root of 66011145 is about 404.1467480648.

The spelling of 66011145 in words is "sixty-six million, eleven thousand, one hundred forty-five".