6690724507 has 4 divisors (see below), whose sum is σ = 6692435680. Its totient is φ = 6689013336.

The previous prime is 6690724501. The next prime is 6690724571. The reversal of 6690724507 is 7054270966.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6690724507 - 2³ = 6690724499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6690724501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 849708 + ... + 857545.

It is an arithmetic number, because the mean of its divisors is an integer number (1673108920).

Almost surely, 2^6690724507 is an apocalyptic number.

6690724507 is a deficient number, since it is larger than the sum of its proper divisors (1711173).

6690724507 is a wasteful number, since it uses less digits than its factorization.

6690724507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1711172.

The product of its (nonzero) digits is 635040, while the sum is 46.

The square root of 6690724507 is about 81796.8490041028. The cubic root of 6690724507 is about 1884.3332693990. Note that the first 3 decimals are identical.

The spelling of 6690724507 in words is "six billion, six hundred ninety million, seven hundred twenty-four thousand, five hundred seven".