61075657 has 2 divisors, whose sum is σ = 61075658. Its totient is φ = 61075656.

The previous prime is 61075639. The next prime is 61075667. The reversal of 61075657 is 75657016.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37222201 + 23853456 = 6101^2 + 4884^2 .

It is a cyclic number.

It is not a de Polignac number, because 61075657 - 2⁷ = 61075529 is a prime.

It is not a weakly prime, because it can be changed into another prime (61075667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30537828 + 30537829.

It is an arithmetic number, because the mean of its divisors is an integer number (30537829).

Almost surely, 2^61075657 is an apocalyptic number.

It is an amenable number.

61075657 is a deficient number, since it is larger than the sum of its proper divisors (1).

61075657 is an equidigital number, since it uses as much as digits as its factorization.

61075657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 44100, while the sum is 37.

The square root of 61075657 is about 7815.0916181450. The cubic root of 61075657 is about 393.8123961922.

It can be divided in two parts, 610 and 75657, that added together give a palindrome (76267).

The spelling of 61075657 in words is "sixty-one million, seventy-five thousand, six hundred fifty-seven".