2166401634 has 8 divisors (see below), whose sum is σ = 4332803280. Its totient is φ = 722133876.

The previous prime is 2166401591. The next prime is 2166401729. The reversal of 2166401634 is 4361046612.

It is a sphenic number, since it is the product of 3 distinct primes.

2166401634 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 2166401595 and 2166401604.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180533464 + ... + 180533475.

It is an arithmetic number, because the mean of its divisors is an integer number (541600410).

Almost surely, 2^2166401634 is an apocalyptic number.

2166401634 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2166401634 is a wasteful number, since it uses less digits than its factorization.

2166401634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361066944.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 2166401634 is about 46544.6198179768. The cubic root of 2166401634 is about 1293.9365825045.

The spelling of 2166401634 in words is "two billion, one hundred sixty-six million, four hundred one thousand, six hundred thirty-four".