61667020 has 24 divisors (see below), whose sum is σ = 129679200. Its totient is φ = 24632832.

The previous prime is 61666991. The next prime is 61667033. The reversal of 61667020 is 2076616.

It is a self number, because there is not a number n which added to its sum of digits gives 61667020.

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, 16921 + ... + 20239.

It is an arithmetic number, because the mean of its divisors is an integer number (5403300).

Almost surely, 2^61667020 is an apocalyptic number.

It is an amenable number.

61667020 is an abundant number, since it is smaller than the sum of its proper divisors (68012180).

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

61667020 is a wasteful number, since it uses less digits than its factorization.

61667020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4257 (or 4255 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 61667020 is about 7852.8351568080. The cubic root of 61667020 is about 395.0793410029.

The spelling of 61667020 in words is "sixty-one million, six hundred sixty-seven thousand, twenty".