661442034 has 32 divisors (see below), whose sum is σ = 1492914240. Its totient is φ = 193524800.

The previous prime is 661442021. The next prime is 661442051. The reversal of 661442034 is 430244166.

It is a junction number, because it is equal to n+sod(n) for n = 661441992 and 661442010.

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, 170877 + ... + 174704.

It is an arithmetic number, because the mean of its divisors is an integer number (46653570).

Almost surely, 2^661442034 is an apocalyptic number.

661442034 is an abundant number, since it is smaller than the sum of its proper divisors (831472206).

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

661442034 is a wasteful number, since it uses less digits than its factorization.

661442034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345626.

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 661442034 is about 25718.5153926116. The cubic root of 661442034 is about 871.2924086431.

The spelling of 661442034 in words is "six hundred sixty-one million, four hundred forty-two thousand, thirty-four".