149568666 has 32 divisors (see below), whose sum is σ = 325176768. Its totient is φ = 45588480.

The previous prime is 149568659. The next prime is 149568673. The reversal of 149568666 is 666865941.

It is a happy number.

149568666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (149568659) and next prime (149568673).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 615 + ... + 17306.

It is an arithmetic number, because the mean of its divisors is an integer number (10161774).

Almost surely, 2^149568666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 149568666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162588384).

149568666 is an abundant number, since it is smaller than the sum of its proper divisors (175608102).

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

149568666 is a wasteful number, since it uses less digits than its factorization.

149568666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18046.

The product of its digits is 1866240, while the sum is 51.

The square root of 149568666 is about 12229.8268998380. The cubic root of 149568666 is about 530.8195058997.

The spelling of 149568666 in words is "one hundred forty-nine million, five hundred sixty-eight thousand, six hundred sixty-six".