66142970 has 16 divisors (see below), whose sum is σ = 119501568. Its totient is φ = 26358480.

The previous prime is 66142957. The next prime is 66143029. The reversal of 66142970 is 7924166.

It is a self number, because there is not a number n which added to its sum of digits gives 66142970.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9494 + ... + 14913.

It is an arithmetic number, because the mean of its divisors is an integer number (7468848).

Almost surely, 2^66142970 is an apocalyptic number.

66142970 is a deficient number, since it is larger than the sum of its proper divisors (53358598).

66142970 is a wasteful number, since it uses less digits than its factorization.

66142970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24685.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 66142970 is about 8132.8328397920. The cubic root of 66142970 is about 404.4155977147.

The spelling of 66142970 in words is "sixty-six million, one hundred forty-two thousand, nine hundred seventy".