149945566 has 4 divisors (see below), whose sum is σ = 224918352. Its totient is φ = 74972782.

The previous prime is 149945563. The next prime is 149945581. The reversal of 149945566 is 665549941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 665549941 = 7 ⋅95078563.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149945561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37486390 + ... + 37486393.

It is an arithmetic number, because the mean of its divisors is an integer number (56229588).

Almost surely, 2^149945566 is an apocalyptic number.

149945566 is a deficient number, since it is larger than the sum of its proper divisors (74972786).

149945566 is an equidigital number, since it uses as much as digits as its factorization.

149945566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74972785.

The product of its digits is 1166400, while the sum is 49.

The square root of 149945566 is about 12245.2262535243. The cubic root of 149945566 is about 531.2650048634.

The spelling of 149945566 in words is "one hundred forty-nine million, nine hundred forty-five thousand, five hundred sixty-six".