266672293920 has 72 divisors (see below), whose sum is σ = 910019207916. Its totient is φ = 71112611328.

The previous prime is 266672293907. The next prime is 266672293957. The reversal of 266672293920 is 29392276662.

It can be written as a sum of positive squares in 2 ways, for example, as 265550579856 + 1121714064 = 515316^2 + 33492^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×266672293920² (a number of 24 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 92593107 + ... + 92595986.

Almost surely, 2^266672293920 is an apocalyptic number.

266672293920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266672293920 is an abundant number, since it is smaller than the sum of its proper divisors (643346913996).

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

266672293920 is a wasteful number, since it uses less digits than its factorization.

266672293920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185189114 (or 185189103 counting only the distinct ones).

The product of its (nonzero) digits is 5878656, while the sum is 54.

The spelling of 266672293920 in words is "two hundred sixty-six billion, six hundred seventy-two million, two hundred ninety-three thousand, nine hundred twenty".