400066707 has 4 divisors (see below), whose sum is σ = 533422280. Its totient is φ = 266711136.

The previous prime is 400066697. The next prime is 400066739. The reversal of 400066707 is 707660004.

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

It is not a de Polignac number, because 400066707 - 2⁴ = 400066691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400066747) 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, 66677782 + ... + 66677787.

It is an arithmetic number, because the mean of its divisors is an integer number (133355570).

Almost surely, 2^400066707 is an apocalyptic number.

400066707 is a deficient number, since it is larger than the sum of its proper divisors (133355573).

400066707 is a wasteful number, since it uses less digits than its factorization.

400066707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133355572.

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 400066707 is about 20001.6676054773. The cubic root of 400066707 is about 736.8472558996.

It can be divided in two parts, 4000 and 66707, that added together give a palindrome (70707).

The spelling of 400066707 in words is "four hundred million, sixty-six thousand, seven hundred seven".