880951661 has 2 divisors, whose sum is σ = 880951662. Its totient is φ = 880951660.

The previous prime is 880951657. The next prime is 880951703. The reversal of 880951661 is 166159088.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 869896036 + 11055625 = 29494^2 + 3325^2 .

It is a cyclic number.

It is not a de Polignac number, because 880951661 - 2² = 880951657 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (880951601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 440475830 + 440475831.

It is an arithmetic number, because the mean of its divisors is an integer number (440475831).

Almost surely, 2^880951661 is an apocalyptic number.

It is an amenable number.

880951661 is a deficient number, since it is larger than the sum of its proper divisors (1).

880951661 is an equidigital number, since it uses as much as digits as its factorization.

880951661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 44.

The square root of 880951661 is about 29680.8298569969. The cubic root of 880951661 is about 958.6292869194.

The spelling of 880951661 in words is "eight hundred eighty million, nine hundred fifty-one thousand, six hundred sixty-one".