661370334 has 16 divisors (see below), whose sum is σ = 1323613200. Its totient is φ = 220311360.

The previous prime is 661370299. The next prime is 661370341. The reversal of 661370334 is 433073166.

It is a junction number, because it is equal to n+sod(n) for n = 661370295 and 661370304.

It is a congruent number.

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, 26287 + ... + 44874.

It is an arithmetic number, because the mean of its divisors is an integer number (82725825).

Almost surely, 2^661370334 is an apocalyptic number.

661370334 is an abundant number, since it is smaller than the sum of its proper divisors (662242866).

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

661370334 is a wasteful number, since it uses less digits than its factorization.

661370334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72715.

The product of its (nonzero) digits is 27216, while the sum is 33.

The square root of 661370334 is about 25717.1214174526. The cubic root of 661370334 is about 871.2609249454.

The spelling of 661370334 in words is "six hundred sixty-one million, three hundred seventy thousand, three hundred thirty-four".