66022142 has 4 divisors (see below), whose sum is σ = 99033216. Its totient is φ = 33011070.

The previous prime is 66022141. The next prime is 66022193. The reversal of 66022142 is 24122066.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24122066 = 2 ⋅12061033.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66022141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16505534 + ... + 16505537.

It is an arithmetic number, because the mean of its divisors is an integer number (24758304).

Almost surely, 2^66022142 is an apocalyptic number.

66022142 is a deficient number, since it is larger than the sum of its proper divisors (33011074).

66022142 is a wasteful number, since it uses less digits than its factorization.

66022142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33011073.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 66022142 is about 8125.4010362566. The cubic root of 66022142 is about 404.1691895026.

The spelling of 66022142 in words is "sixty-six million, twenty-two thousand, one hundred forty-two".