61657603 has 16 divisors (see below), whose sum is σ = 75582720. Its totient is φ = 49117536.

The previous prime is 61657601. The next prime is 61657613. The reversal of 61657603 is 30675616.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 61657603 - 2¹ = 61657601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61657601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2676 + ... + 11422.

It is an arithmetic number, because the mean of its divisors is an integer number (4723920).

Almost surely, 2^61657603 is an apocalyptic number.

61657603 is a deficient number, since it is larger than the sum of its proper divisors (13925117).

61657603 is a wasteful number, since it uses less digits than its factorization.

61657603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8826.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 61657603 is about 7852.2355415512. The cubic root of 61657603 is about 395.0592294881.

The spelling of 61657603 in words is "sixty-one million, six hundred fifty-seven thousand, six hundred three".