400666707 has 12 divisors (see below), whose sum is σ = 661418160. Its totient is φ = 228952368.

The previous prime is 400666691. The next prime is 400666711. The reversal of 400666707 is 707666004.

It is not a de Polignac number, because 400666707 - 2⁴ = 400666691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400666207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3179832 + ... + 3179957.

It is an arithmetic number, because the mean of its divisors is an integer number (55118180).

Almost surely, 2^400666707 is an apocalyptic number.

400666707 is a deficient number, since it is larger than the sum of its proper divisors (260751453).

400666707 is a wasteful number, since it uses less digits than its factorization.

400666707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6359802 (or 6359799 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 400666707 is about 20016.6607354973. The cubic root of 400666707 is about 737.2154340996.

The spelling of 400666707 in words is "four hundred million, six hundred sixty-six thousand, seven hundred seven".