61669000 has 64 divisors (see below), whose sum is σ = 146240640. Its totient is φ = 24337600.

The previous prime is 61668991. The next prime is 61669001. The reversal of 61669000 is 96616.

It is a happy number.

It is a super-2 number, since 2×61669000² = 7606131122000000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61669000.

It is not an unprimeable number, because it can be changed into a prime (61669001) 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, 82629 + ... + 83371.

It is an arithmetic number, because the mean of its divisors is an integer number (2285010).

Almost surely, 2^61669000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61669000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73120320).

61669000 is an abundant number, since it is smaller than the sum of its proper divisors (84571640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61669000 is a wasteful number, since it uses less digits than its factorization.

61669000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847 (or 833 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 61669000 is about 7852.9612249138. The cubic root of 61669000 is about 395.0835693501.

The spelling of 61669000 in words is "sixty-one million, six hundred sixty-nine thousand".