61820668 has 24 divisors (see below), whose sum is σ = 133152992. Its totient is φ = 24456384.

The previous prime is 61820659. The next prime is 61820669. The reversal of 61820668 is 86602816.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61820669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84555 + ... + 85282.

Almost surely, 2^61820668 is an apocalyptic number.

It is an amenable number.

61820668 is an abundant number, since it is smaller than the sum of its proper divisors (71332324).

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

61820668 is a wasteful number, since it uses less digits than its factorization.

61820668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169861 (or 169859 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 61820668 is about 7862.6120341780. The cubic root of 61820668 is about 395.4071921232.

The spelling of 61820668 in words is "sixty-one million, eight hundred twenty thousand, six hundred sixty-eight".