69999663 has 4 divisors (see below), whose sum is σ = 93332888. Its totient is φ = 46666440.

The previous prime is 69999661. The next prime is 69999673. The reversal of 69999663 is 36699996.

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

It is not a de Polignac number, because 69999663 - 2¹ = 69999661 is a prime.

It is a super-2 number, since 2×69999663² = 9799905640227138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69999661) 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, 11666608 + ... + 11666613.

It is an arithmetic number, because the mean of its divisors is an integer number (23333222).

Almost surely, 2^69999663 is an apocalyptic number.

69999663 is a deficient number, since it is larger than the sum of its proper divisors (23333225).

69999663 is a wasteful number, since it uses less digits than its factorization.

69999663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23333224.

The product of its digits is 4251528, while the sum is 57.

The square root of 69999663 is about 8366.5801257144. The cubic root of 69999663 is about 412.1278686116.

The spelling of 69999663 in words is "sixty-nine million, nine hundred ninety-nine thousand, six hundred sixty-three".