407720399668 has 24 divisors (see below), whose sum is σ = 719255523168. Its totient is φ = 202224144096.

The previous prime is 407720399663. The next prime is 407720399689. The reversal of 407720399668 is 866993027704.

It is a super-3 number, since 3×407720399668³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (407720399663) 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, 358446 + ... + 971557.

It is an arithmetic number, because the mean of its divisors is an integer number (29968980132).

Almost surely, 2^407720399668 is an apocalyptic number.

It is an amenable number.

407720399668 is a deficient number, since it is larger than the sum of its proper divisors (311535123500).

407720399668 is a wasteful number, since it uses less digits than its factorization.

407720399668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1330623 (or 1330621 counting only the distinct ones).

The product of its (nonzero) digits is 27433728, while the sum is 61.

The spelling of 407720399668 in words is "four hundred seven billion, seven hundred twenty million, three hundred ninety-nine thousand, six hundred sixty-eight".