266861942 has 4 divisors (see below), whose sum is σ = 400292916. Its totient is φ = 133430970.

The previous prime is 266861941. The next prime is 266861993. The reversal of 266861942 is 249168662.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×266861942² = 142430592176022728, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 266861893 and 266861902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266861941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66715484 + ... + 66715487.

It is an arithmetic number, because the mean of its divisors is an integer number (100073229).

Almost surely, 2^266861942 is an apocalyptic number.

266861942 is a deficient number, since it is larger than the sum of its proper divisors (133430974).

266861942 is a wasteful number, since it uses less digits than its factorization.

266861942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133430973.

The product of its digits is 248832, while the sum is 44.

The square root of 266861942 is about 16335.9095859398. The cubic root of 266861942 is about 643.8166649534.

The spelling of 266861942 in words is "two hundred sixty-six million, eight hundred sixty-one thousand, nine hundred forty-two".