61072657 has 4 divisors (see below), whose sum is σ = 62562276. Its totient is φ = 59583040.

The previous prime is 61072643. The next prime is 61072663. The reversal of 61072657 is 75627016.

61072657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20061441 + 41011216 = 4479^2 + 6404^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61072657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61072667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 744748 + ... + 744829.

It is an arithmetic number, because the mean of its divisors is an integer number (15640569).

Almost surely, 2^61072657 is an apocalyptic number.

It is an amenable number.

61072657 is a deficient number, since it is larger than the sum of its proper divisors (1489619).

61072657 is a wasteful number, since it uses less digits than its factorization.

61072657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1489618.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 61072657 is about 7814.8996794585. The cubic root of 61072657 is about 393.8059481430.

The spelling of 61072657 in words is "sixty-one million, seventy-two thousand, six hundred fifty-seven".