6690730 has 32 divisors (see below), whose sum is σ = 12607488. Its totient is φ = 2553600.

The previous prime is 6690721. The next prime is 6690737. The reversal of 6690730 is 370966.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 6690692 and 6690701.

It is not an unprimeable number, because it can be changed into a prime (6690737) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34935 + ... + 35125.

It is an arithmetic number, because the mean of its divisors is an integer number (393984).

Almost surely, 2^6690730 is an apocalyptic number.

6690730 is a deficient number, since it is larger than the sum of its proper divisors (5916758).

6690730 is a wasteful number, since it uses less digits than its factorization.

6690730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342.

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 6690730 is about 2586.6445445789. The cubic root of 6690730 is about 188.4333785070.

The spelling of 6690730 in words is "six million, six hundred ninety thousand, seven hundred thirty".