61694663 has 4 divisors (see below), whose sum is σ = 61742688. Its totient is φ = 61646640.

The previous prime is 61694657. The next prime is 61694693. The reversal of 61694663 is 36649616.

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

It is a cyclic number.

It is not a de Polignac number, because 61694663 - 2⁸ = 61694407 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61694663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61694623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22031 + ... + 24672.

It is an arithmetic number, because the mean of its divisors is an integer number (15435672).

Almost surely, 2^61694663 is an apocalyptic number.

61694663 is a deficient number, since it is larger than the sum of its proper divisors (48025).

61694663 is a wasteful number, since it uses less digits than its factorization.

61694663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48024.

The product of its digits is 139968, while the sum is 41.

The square root of 61694663 is about 7854.5950245700. The cubic root of 61694663 is about 395.1383652419.

The spelling of 61694663 in words is "sixty-one million, six hundred ninety-four thousand, six hundred sixty-three".