30661660 has 12 divisors (see below), whose sum is σ = 64389528. Its totient is φ = 12264656.

The previous prime is 30661643. The next prime is 30661661. The reversal of 30661660 is 6616603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30661661) 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, 766522 + ... + 766561.

It is an arithmetic number, because the mean of its divisors is an integer number (5365794).

Almost surely, 2^30661660 is an apocalyptic number.

It is an amenable number.

30661660 is an abundant number, since it is smaller than the sum of its proper divisors (33727868).

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

30661660 is a wasteful number, since it uses less digits than its factorization.

30661660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1533092 (or 1533090 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 30661660 is about 5537.2971746151. The cubic root of 30661660 is about 312.9910275169.

The spelling of 30661660 in words is "thirty million, six hundred sixty-one thousand, six hundred sixty".