266400406642 has 8 divisors (see below), whose sum is σ = 408893647536. Its totient is φ = 130102524132.

The previous prime is 266400406633. The next prime is 266400406681. The reversal of 266400406642 is 246604004662.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 266400406595 and 266400406604.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1548839488 + ... + 1548839659.

It is an arithmetic number, because the mean of its divisors is an integer number (51111705942).

Almost surely, 2^266400406642 is an apocalyptic number.

266400406642 is a deficient number, since it is larger than the sum of its proper divisors (142493240894).

266400406642 is a wasteful number, since it uses less digits than its factorization.

266400406642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3097679192.

The product of its (nonzero) digits is 331776, while the sum is 40.

The spelling of 266400406642 in words is "two hundred sixty-six billion, four hundred million, four hundred six thousand, six hundred forty-two".