6990432505 has 16 divisors (see below), whose sum is σ = 9650375424. Its totient is φ = 4761691200.

The previous prime is 6990432479. The next prime is 6990432511. The reversal of 6990432505 is 5052340996.

6990432505 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6990432505 - 2⁷ = 6990432377 is a prime.

It is a super-2 number, since 2×6990432505² = 97732293213921150050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 656062 + ... + 666631.

It is an arithmetic number, because the mean of its divisors is an integer number (603148464).

Almost surely, 2^6990432505 is an apocalyptic number.

It is an amenable number.

6990432505 is a deficient number, since it is larger than the sum of its proper divisors (2659942919).

6990432505 is a wasteful number, since it uses less digits than its factorization.

6990432505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1322856.

The product of its (nonzero) digits is 291600, while the sum is 43.

The square root of 6990432505 is about 83608.8063842560. The cubic root of 6990432505 is about 1912.0592635274.

The spelling of 6990432505 in words is "six billion, nine hundred ninety million, four hundred thirty-two thousand, five hundred five".