40699261866 has 32 divisors (see below), whose sum is σ = 87675287040. Its totient is φ = 12553503984.

The previous prime is 40699261861. The next prime is 40699261879. The reversal of 40699261866 is 66816299604.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (40699261861) 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, 4146390 + ... + 4156193.

It is an arithmetic number, because the mean of its divisors is an integer number (2739852720).

Almost surely, 2^40699261866 is an apocalyptic number.

40699261866 is an abundant number, since it is smaller than the sum of its proper divisors (46976025174).

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

40699261866 is a wasteful number, since it uses less digits than its factorization.

40699261866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8302650.

The product of its (nonzero) digits is 6718464, while the sum is 57.

The spelling of 40699261866 in words is "forty billion, six hundred ninety-nine million, two hundred sixty-one thousand, eight hundred sixty-six".