61661488 has 40 divisors (see below), whose sum is σ = 136911872. Its totient is φ = 26353728.

The previous prime is 61661473. The next prime is 61661491. The reversal of 61661488 is 88416616.

It is a super-3 number, since 3×61661488³ (a number of 24 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61661488.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67531 + ... + 68437.

Almost surely, 2^61661488 is an apocalyptic number.

It is an amenable number.

61661488 is an abundant number, since it is smaller than the sum of its proper divisors (75250384).

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

61661488 is a wasteful number, since it uses less digits than its factorization.

61661488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1529 (or 1523 counting only the distinct ones).

The product of its digits is 55296, while the sum is 40.

The square root of 61661488 is about 7852.4829194338. The cubic root of 61661488 is about 395.0675267772.

The spelling of 61661488 in words is "sixty-one million, six hundred sixty-one thousand, four hundred eighty-eight".