266142061 has 4 divisors (see below), whose sum is σ = 267154272. Its totient is φ = 265129852.

The previous prime is 266142053. The next prime is 266142067. The reversal of 266142061 is 160241662.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 266142061 - 2³ = 266142053 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 (266142067) 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, 505711 + ... + 506236.

It is an arithmetic number, because the mean of its divisors is an integer number (66788568).

Almost surely, 2^266142061 is an apocalyptic number.

It is an amenable number.

266142061 is a deficient number, since it is larger than the sum of its proper divisors (1012211).

266142061 is a wasteful number, since it uses less digits than its factorization.

266142061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012210.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 266142061 is about 16313.8610083573. The cubic root of 266142061 is about 643.2372283142.

The spelling of 266142061 in words is "two hundred sixty-six million, one hundred forty-two thousand, sixty-one".