61667480 has 96 divisors (see below), whose sum is σ = 163995840. Its totient is φ = 20805120.

The previous prime is 61667471. The next prime is 61667503. The reversal of 61667480 is 8476616.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 142865 + ... + 143295.

It is an arithmetic number, because the mean of its divisors is an integer number (1708290).

Almost surely, 2^61667480 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 61667480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81997920).

61667480 is an abundant number, since it is smaller than the sum of its proper divisors (102328360).

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

61667480 is a wasteful number, since it uses less digits than its factorization.

61667480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529 (or 518 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 61667480 is about 7852.8644455383. The cubic root of 61667480 is about 395.0803233543.

The spelling of 61667480 in words is "sixty-one million, six hundred sixty-seven thousand, four hundred eighty".