61600669 has 12 divisors (see below), whose sum is σ = 69009300. Its totient is φ = 54897024.

The previous prime is 61600657. The next prime is 61600699. The reversal of 61600669 is 96600616.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 56644 + 61544025 = 238^2 + 7845^2 .

It is not a de Polignac number, because 61600669 - 2⁷ = 61600541 is a prime.

It is a super-2 number, since 2×61600669² = 7589284842495122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61600619) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1384 + ... + 11185.

It is an arithmetic number, because the mean of its divisors is an integer number (5750775).

Almost surely, 2^61600669 is an apocalyptic number.

It is an amenable number.

61600669 is a deficient number, since it is larger than the sum of its proper divisors (7408631).

61600669 is a wasteful number, since it uses less digits than its factorization.

61600669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12624 (or 12611 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 61600669 is about 7848.6093672701. The cubic root of 61600669 is about 394.9375941575.

The spelling of 61600669 in words is "sixty-one million, six hundred thousand, six hundred sixty-nine".