3660915891 has 24 divisors (see below), whose sum is σ = 5218530304. Its totient is φ = 2280388320.

The previous prime is 3660915887. The next prime is 3660915899. The reversal of 3660915891 is 1985190663.

3660915891 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3660915891 - 2² = 3660915887 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3660915891.

It is not an unprimeable number, because it can be changed into a prime (3660915899) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54810 + ... + 101616.

Almost surely, 2^3660915891 is an apocalyptic number.

3660915891 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

3660915891 is a deficient number, since it is larger than the sum of its proper divisors (1557614413).

3660915891 is a wasteful number, since it uses less digits than its factorization.

3660915891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46899 (or 46870 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 48.

The square root of 3660915891 is about 60505.5029811339. The cubic root of 3660915891 is about 1541.2150823806.

The spelling of 3660915891 in words is "three billion, six hundred sixty million, nine hundred fifteen thousand, eight hundred ninety-one".