400669733687 has 16 divisors (see below), whose sum is σ = 406537917408. Its totient is φ = 394827638400.

The previous prime is 400669733683. The next prime is 400669733701. The reversal of 400669733687 is 786337966004.

It is a cyclic number.

It is not a de Polignac number, because 400669733687 - 2² = 400669733683 is a prime.

It is a super-2 number, since 2×400669733687² (a number of 24 digits) 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 (400669733683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66190553 + ... + 66196605.

It is an arithmetic number, because the mean of its divisors is an integer number (25408619838).

Almost surely, 2^400669733687 is an apocalyptic number.

400669733687 is a deficient number, since it is larger than the sum of its proper divisors (5868183721).

400669733687 is a wasteful number, since it uses less digits than its factorization.

400669733687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8050.

The product of its (nonzero) digits is 27433728, while the sum is 59.

The spelling of 400669733687 in words is "four hundred billion, six hundred sixty-nine million, seven hundred thirty-three thousand, six hundred eighty-seven".