266916642630 has 32 divisors (see below), whose sum is σ = 698836301568. Its totient is φ = 64707064800.

The previous prime is 266916642607. The next prime is 266916642647. The reversal of 266916642630 is 36246619662.

It is a super-2 number, since 2×266916642630² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 404418826 + ... + 404419485.

It is an arithmetic number, because the mean of its divisors is an integer number (21838634424).

Almost surely, 2^266916642630 is an apocalyptic number.

266916642630 is an abundant number, since it is smaller than the sum of its proper divisors (431919658938).

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

266916642630 is a wasteful number, since it uses less digits than its factorization.

266916642630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808838332.

The product of its (nonzero) digits is 3359232, while the sum is 51.

The spelling of 266916642630 in words is "two hundred sixty-six billion, nine hundred sixteen million, six hundred forty-two thousand, six hundred thirty".