144400666 has 16 divisors (see below), whose sum is σ = 225577728. Its totient is φ = 69249600.

The previous prime is 144400649. The next prime is 144400687. The reversal of 144400666 is 666004441.

It is a Harshad number since it is a multiple of its sum of digits (31).

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, 3300 + ... + 17311.

It is an arithmetic number, because the mean of its divisors is an integer number (14098608).

Almost surely, 2^144400666 is an apocalyptic number.

144400666 is a deficient number, since it is larger than the sum of its proper divisors (81177062).

144400666 is a wasteful number, since it uses less digits than its factorization.

144400666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20757.

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 144400666 is about 12016.6828201463. The cubic root of 144400666 is about 524.6339592095.

The spelling of 144400666 in words is "one hundred forty-four million, four hundred thousand, six hundred sixty-six".