77142066 has 16 divisors (see below), whose sum is σ = 154454688. Its totient is φ = 25685600.

The previous prime is 77142061. The next prime is 77142067. The reversal of 77142066 is 66024177.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (77142061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 795 + ... + 12446.

It is an arithmetic number, because the mean of its divisors is an integer number (9653418).

Almost surely, 2^77142066 is an apocalyptic number.

77142066 is an abundant number, since it is smaller than the sum of its proper divisors (77312622).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77142066 is a wasteful number, since it uses less digits than its factorization.

77142066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14217.

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 77142066 is about 8783.0556186330. The cubic root of 77142066 is about 425.6935683398.

The spelling of 77142066 in words is "seventy-seven million, one hundred forty-two thousand, sixty-six".