3662719921 has 16 divisors (see below), whose sum is σ = 4434770304. Its totient is φ = 2953085184.

The previous prime is 3662719891. The next prime is 3662719943. The reversal of 3662719921 is 1299172663.

It is a happy number.

3662719921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3662719921 - 2⁷ = 3662719793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3662719961) 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, 222066 + ... + 237988.

It is an arithmetic number, because the mean of its divisors is an integer number (277173144).

Almost surely, 2^3662719921 is an apocalyptic number.

It is an amenable number.

3662719921 is a deficient number, since it is larger than the sum of its proper divisors (772050383).

3662719921 is a wasteful number, since it uses less digits than its factorization.

3662719921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17880.

The product of its digits is 244944, while the sum is 46.

The square root of 3662719921 is about 60520.4091278306. The cubic root of 3662719921 is about 1541.4682013399.

The spelling of 3662719921 in words is "three billion, six hundred sixty-two million, seven hundred nineteen thousand, nine hundred twenty-one".