61015666206 has 32 divisors (see below), whose sum is σ = 135381456000. Its totient is φ = 18176211680.

The previous prime is 61015666199. The next prime is 61015666211. The reversal of 61015666206 is 60266651016.

61015666206 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7830681 + ... + 7838468.

It is an arithmetic number, because the mean of its divisors is an integer number (4230670500).

Almost surely, 2^61015666206 is an apocalyptic number.

61015666206 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

61015666206 is an abundant number, since it is smaller than the sum of its proper divisors (74365789794).

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

61015666206 is a wasteful number, since it uses less digits than its factorization.

61015666206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15669224.

The product of its (nonzero) digits is 77760, while the sum is 39.

The spelling of 61015666206 in words is "sixty-one billion, fifteen million, six hundred sixty-six thousand, two hundred six".