61966617 has 16 divisors (see below), whose sum is σ = 83778240. Its totient is φ = 40737600.

The previous prime is 61966603. The next prime is 61966627. The reversal of 61966617 is 71666916.

It is not a de Polignac number, because 61966617 - 2⁸ = 61966361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61966627) 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, 75067 + ... + 75887.

It is an arithmetic number, because the mean of its divisors is an integer number (5236140).

Almost surely, 2^61966617 is an apocalyptic number.

It is an amenable number.

61966617 is a deficient number, since it is larger than the sum of its proper divisors (21811623).

61966617 is a wasteful number, since it uses less digits than its factorization.

61966617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1144.

The product of its digits is 81648, while the sum is 42.

The square root of 61966617 is about 7871.8877659682. The cubic root of 61966617 is about 395.7181125721.

The spelling of 61966617 in words is "sixty-one million, nine hundred sixty-six thousand, six hundred seventeen".