7661057 has 2 divisors, whose sum is σ = 7661058. Its totient is φ = 7661056.

The previous prime is 7661053. The next prime is 7661077. The reversal of 7661057 is 7501667.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7230721 + 430336 = 2689^2 + 656^2 .

It is an emirp because it is prime and its reverse (7501667) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7661057 - 2² = 7661053 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7661053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3830528 + 3830529.

It is an arithmetic number, because the mean of its divisors is an integer number (3830529).

Almost surely, 2^7661057 is an apocalyptic number.

It is an amenable number.

7661057 is a deficient number, since it is larger than the sum of its proper divisors (1).

7661057 is an equidigital number, since it uses as much as digits as its factorization.

7661057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8820, while the sum is 32.

The square root of 7661057 is about 2767.8614488446. The cubic root of 7661057 is about 197.1346190084.

It can be divided in two parts, 76610 and 57, that added together give a palindrome (76667).

The spelling of 7661057 in words is "seven million, six hundred sixty-one thousand, fifty-seven".