61698220 has 12 divisors (see below), whose sum is σ = 129566304. Its totient is φ = 24679280.

The previous prime is 61698209. The next prime is 61698227. The reversal of 61698220 is 2289616.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (61698227) 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, 1542436 + ... + 1542475.

It is an arithmetic number, because the mean of its divisors is an integer number (10797192).

Almost surely, 2^61698220 is an apocalyptic number.

It is an amenable number.

61698220 is an abundant number, since it is smaller than the sum of its proper divisors (67868084).

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

61698220 is a wasteful number, since it uses less digits than its factorization.

61698220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3084920 (or 3084918 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 61698220 is about 7854.8214492756. The cubic root of 61698220 is about 395.1459589844.

The spelling of 61698220 in words is "sixty-one million, six hundred ninety-eight thousand, two hundred twenty".