880666278749 has 2 divisors, whose sum is σ = 880666278750. Its totient is φ = 880666278748.

The previous prime is 880666278743. The next prime is 880666278797. The reversal of 880666278749 is 947872666088.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 865052526724 + 15613752025 = 930082^2 + 124955^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-880666278749 is a prime.

It is a super-2 number, since 2×880666278749² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (880666278743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 440333139374 + 440333139375.

It is an arithmetic number, because the mean of its divisors is an integer number (440333139375).

Almost surely, 2^880666278749 is an apocalyptic number.

It is an amenable number.

880666278749 is a deficient number, since it is larger than the sum of its proper divisors (1).

880666278749 is an equidigital number, since it uses as much as digits as its factorization.

880666278749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 390168576, while the sum is 71.

The spelling of 880666278749 in words is "eight hundred eighty billion, six hundred sixty-six million, two hundred seventy-eight thousand, seven hundred forty-nine".