661320034 has 8 divisors (see below), whose sum is σ = 994272300. Its totient is φ = 329895936.

The previous prime is 661320029. The next prime is 661320071. The reversal of 661320034 is 430023166.

It can be written as a sum of positive squares in 2 ways, for example, as 568679409 + 92640625 = 23847^2 + 9625^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×661320034² = 874688374739522312, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 661319990 and 661320008.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 380959 + ... + 382690.

Almost surely, 2^661320034 is an apocalyptic number.

661320034 is a deficient number, since it is larger than the sum of its proper divisors (332952266).

661320034 is a wasteful number, since it uses less digits than its factorization.

661320034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764084.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 661320034 is about 25716.1434511476. The cubic root of 661320034 is about 871.2388366975.

The spelling of 661320034 in words is "six hundred sixty-one million, three hundred twenty thousand, thirty-four".