4040640666402 has 32 divisors (see below), whose sum is σ = 8440150745088. Its totient is φ = 1287172950096.

The previous prime is 4040640666401. The next prime is 4040640666437. The reversal of 4040640666402 is 2046660460404.

It is not an unprimeable number, because it can be changed into a prime (4040640666401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12881538 + ... + 13191485.

It is an arithmetic number, because the mean of its divisors is an integer number (263754710784).

Almost surely, 2^{4040640666402} is an apocalyptic number.

4040640666402 is an abundant number, since it is smaller than the sum of its proper divisors (4399510078686).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4040640666402 is a wasteful number, since it uses less digits than its factorization.

4040640666402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26074174.

The product of its (nonzero) digits is 663552, while the sum is 42.

The spelling of 4040640666402 in words is "four trillion, forty billion, six hundred forty million, six hundred sixty-six thousand, four hundred two".