266690535478 has 16 divisors (see below), whose sum is σ = 402223645440. Its totient is φ = 132616382976.

The previous prime is 266690535473. The next prime is 266690535521. The reversal of 266690535478 is 874535096662.

It is a super-2 number, since 2×266690535478² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266690535473) 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, 1275883 + ... + 1470121.

It is an arithmetic number, because the mean of its divisors is an integer number (25138977840).

Almost surely, 2^266690535478 is an apocalyptic number.

266690535478 is a deficient number, since it is larger than the sum of its proper divisors (135533109962).

266690535478 is a wasteful number, since it uses less digits than its factorization.

266690535478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197991.

The product of its (nonzero) digits is 65318400, while the sum is 61.

The spelling of 266690535478 in words is "two hundred sixty-six billion, six hundred ninety million, five hundred thirty-five thousand, four hundred seventy-eight".