145726666 has 16 divisors (see below), whose sum is σ = 230315904. Its totient is φ = 69016464.

The previous prime is 145726663. The next prime is 145726673. The reversal of 145726666 is 666627541.

It is a happy number.

It is a super-2 number, since 2×145726666² = 42472522366951112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145726663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10641 + ... + 20116.

It is an arithmetic number, because the mean of its divisors is an integer number (14394744).

Almost surely, 2^145726666 is an apocalyptic number.

145726666 is a deficient number, since it is larger than the sum of its proper divisors (84589238).

145726666 is a wasteful number, since it uses less digits than its factorization.

145726666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30885.

The product of its digits is 362880, while the sum is 43.

The square root of 145726666 is about 12071.7300334293. The cubic root of 145726666 is about 526.2349353154.

The spelling of 145726666 in words is "one hundred forty-five million, seven hundred twenty-six thousand, six hundred sixty-six".