66150442 has 4 divisors (see below), whose sum is σ = 99225666. Its totient is φ = 33075220.

The previous prime is 66150437. The next prime is 66150449. The reversal of 66150442 is 24405166.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 45819361 + 20331081 = 6769^2 + 4509^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 66150442.

It is not an unprimeable number, because it can be changed into a prime (66150449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16537609 + ... + 16537612.

Almost surely, 2^66150442 is an apocalyptic number.

66150442 is a deficient number, since it is larger than the sum of its proper divisors (33075224).

66150442 is a wasteful number, since it uses less digits than its factorization.

66150442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33075223.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 66150442 is about 8133.2921993495. The cubic root of 66150442 is about 404.4308257355.

The spelling of 66150442 in words is "sixty-six million, one hundred fifty thousand, four hundred forty-two".