66142007 has 4 divisors (see below), whose sum is σ = 66249480. Its totient is φ = 66034536.

The previous prime is 66141991. The next prime is 66142033. The reversal of 66142007 is 70024166.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70024166 = 2 ⋅35012083.

It is a cyclic number.

It is not a de Polignac number, because 66142007 - 2⁴ = 66141991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66142057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52808 + ... + 54045.

It is an arithmetic number, because the mean of its divisors is an integer number (16562370).

Almost surely, 2^66142007 is an apocalyptic number.

66142007 is a deficient number, since it is larger than the sum of its proper divisors (107473).

66142007 is a wasteful number, since it uses less digits than its factorization.

66142007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107472.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 66142007 is about 8132.7736351137. The cubic root of 66142007 is about 404.4136350263.

The spelling of 66142007 in words is "sixty-six million, one hundred forty-two thousand, seven".