61668532 has 12 divisors (see below), whose sum is σ = 107988160. Its totient is φ = 30814776.

The previous prime is 61668527. The next prime is 61668539. The reversal of 61668532 is 23586616.

It is a junction number, because it is equal to n+sod(n) for n = 61668491 and 61668500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61668539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4069 + ... + 11827.

Almost surely, 2^61668532 is an apocalyptic number.

It is an amenable number.

61668532 is a deficient number, since it is larger than the sum of its proper divisors (46319628).

61668532 is a wasteful number, since it uses less digits than its factorization.

61668532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9750 (or 9748 counting only the distinct ones).

The product of its digits is 51840, while the sum is 37.

The square root of 61668532 is about 7852.9314271806. The cubic root of 61668532 is about 395.0825699308.

The spelling of 61668532 in words is "sixty-one million, six hundred sixty-eight thousand, five hundred thirty-two".