661415334 has 32 divisors (see below), whose sum is σ = 1348592640. Its totient is φ = 216216000.

The previous prime is 661415309. The next prime is 661415341. The reversal of 661415334 is 433514166.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 661415295 and 661415304.

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, 66954 + ... + 76194.

It is an arithmetic number, because the mean of its divisors is an integer number (42143520).

Almost surely, 2^661415334 is an apocalyptic number.

661415334 is an abundant number, since it is smaller than the sum of its proper divisors (687177306).

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

661415334 is a wasteful number, since it uses less digits than its factorization.

661415334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9476.

The product of its digits is 25920, while the sum is 33.

The square root of 661415334 is about 25717.9963060889. The cubic root of 661415334 is about 871.2806848542.

The spelling of 661415334 in words is "six hundred sixty-one million, four hundred fifteen thousand, three hundred thirty-four".