401966699 has 4 divisors (see below), whose sum is σ = 419443536. Its totient is φ = 384489864.

The previous prime is 401966657. The next prime is 401966723. The reversal of 401966699 is 996669104.

It is a happy number.

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 401966699 - 2⁸ = 401966443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401966099) 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, 8738384 + ... + 8738429.

It is an arithmetic number, because the mean of its divisors is an integer number (104860884).

Almost surely, 2^401966699 is an apocalyptic number.

401966699 is a deficient number, since it is larger than the sum of its proper divisors (17476837).

401966699 is a wasteful number, since it uses less digits than its factorization.

401966699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17476836.

The product of its (nonzero) digits is 629856, while the sum is 50.

The square root of 401966699 is about 20049.1071871044. The cubic root of 401966699 is about 738.0118895321.

The spelling of 401966699 in words is "four hundred one million, nine hundred sixty-six thousand, six hundred ninety-nine".