3666720 has 48 divisors (see below), whose sum is σ = 11551680. Its totient is φ = 977664.

The previous prime is 3666703. The next prime is 3666727. The reversal of 3666720 is 276663.

3666720 = T₃₀₆ + T₃₀₇ + ... + T₃₆₉.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (3666727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3340 + ... + 4299.

It is an arithmetic number, because the mean of its divisors is an integer number (240660).

Almost surely, 2^3666720 is an apocalyptic number.

3666720 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3666720 is an abundant number, since it is smaller than the sum of its proper divisors (7884960).

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

3666720 is a wasteful number, since it uses less digits than its factorization.

3666720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7657 (or 7649 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 30.

The square root of 3666720 is about 1914.8681416745. The cubic root of 3666720 is about 154.2029146160.

The spelling of 3666720 in words is "three million, six hundred sixty-six thousand, seven hundred twenty".