280780733066 has 8 divisors (see below), whose sum is σ = 421304012580. Its totient is φ = 140346062208.

The previous prime is 280780733039. The next prime is 280780733081. The reversal of 280780733066 is 660337087082.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 235439418841 + 45341314225 = 485221^2 + 212935^2 .

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

It is a super-2 number, since 2×280780733066² (a number of 24 digits) contains 22 as substring.

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, 22144241 + ... + 22156916.

Almost surely, 2^280780733066 is an apocalyptic number.

280780733066 is a deficient number, since it is larger than the sum of its proper divisors (140523279514).

280780733066 is a wasteful number, since it uses less digits than its factorization.

280780733066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44304328.

The product of its (nonzero) digits is 2032128, while the sum is 50.

The spelling of 280780733066 in words is "two hundred eighty billion, seven hundred eighty million, seven hundred thirty-three thousand, sixty-six".