660290340 has 24 divisors (see below), whose sum is σ = 1848813120. Its totient is φ = 176077408.

The previous prime is 660290303. The next prime is 660290401. The reversal of 660290340 is 43092066.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 660290298 and 660290307.

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, 5502360 + ... + 5502479.

It is an arithmetic number, because the mean of its divisors is an integer number (77033880).

Almost surely, 2^660290340 is an apocalyptic number.

660290340 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

660290340 is an abundant number, since it is smaller than the sum of its proper divisors (1188522780).

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

660290340 is a wasteful number, since it uses less digits than its factorization.

660290340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11004851 (or 11004849 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 660290340 is about 25696.1152706007. The cubic root of 660290340 is about 870.7864206367.

The spelling of 660290340 in words is "six hundred sixty million, two hundred ninety thousand, three hundred forty".