30660761 has 2 divisors, whose sum is σ = 30660762. Its totient is φ = 30660760.

The previous prime is 30660757. The next prime is 30660787. The reversal of 30660761 is 16706603.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28686736 + 1974025 = 5356^2 + 1405^2 .

It is an emirp because it is prime and its reverse (16706603) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30660761 - 2² = 30660757 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (30660961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15330380 + 15330381.

It is an arithmetic number, because the mean of its divisors is an integer number (15330381).

Almost surely, 2^30660761 is an apocalyptic number.

It is an amenable number.

30660761 is a deficient number, since it is larger than the sum of its proper divisors (1).

30660761 is an equidigital number, since it uses as much as digits as its factorization.

30660761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 30660761 is about 5537.2159972318. The cubic root of 30660761 is about 312.9879685209.

The spelling of 30660761 in words is "thirty million, six hundred sixty thousand, seven hundred sixty-one".