699661801 has 8 divisors (see below), whose sum is σ = 726798600. Its totient is φ = 672725760.

The previous prime is 699661777. The next prime is 699661811. The reversal of 699661801 is 108166996.

It can be written as a sum of positive squares in 4 ways, for example, as 55517401 + 644144400 = 7451^2 + 25380^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 699661801 - 2²⁵ = 666107369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (699661811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43066 + ... + 57043.

It is an arithmetic number, because the mean of its divisors is an integer number (90849825).

Almost surely, 2^699661801 is an apocalyptic number.

It is an amenable number.

699661801 is a deficient number, since it is larger than the sum of its proper divisors (27136799).

699661801 is a wasteful number, since it uses less digits than its factorization.

699661801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100379.

The product of its (nonzero) digits is 139968, while the sum is 46.

The square root of 699661801 is about 26451.1209781363. The cubic root of 699661801 is about 887.7609843050.

The spelling of 699661801 in words is "six hundred ninety-nine million, six hundred sixty-one thousand, eight hundred one".