61967808 has 224 divisors, whose sum is σ = 214579200. Its totient is φ = 17169408.

The previous prime is 61967803. The next prime is 61967813. The reversal of 61967808 is 80876916.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (61967803) and next prime (61967813).

It is a tau number, because it is divible by the number of its divisors (224).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61967803) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 568458 + ... + 568566.

Almost surely, 2^61967808 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 61967808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107289600).

61967808 is an abundant number, since it is smaller than the sum of its proper divisors (152611392).

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

61967808 is a wasteful number, since it uses less digits than its factorization.

61967808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184 (or 168 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 61967808 is about 7871.9634145491. The cubic root of 61967808 is about 395.7206477933.

The spelling of 61967808 in words is "sixty-one million, nine hundred sixty-seven thousand, eight hundred eight".