3661747740 has 144 divisors (see below), whose sum is σ = 12933805248. Its totient is φ = 821164032.

The previous prime is 3661747633. The next prime is 3661747741. The reversal of 3661747740 is 477471663.

It is a super-2 number, since 2×3661747740² = 26816793022790215200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3661747741) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 39364 + ... + 94196.

It is an arithmetic number, because the mean of its divisors is an integer number (89818092).

Almost surely, 2^3661747740 is an apocalyptic number.

3661747740 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3661747740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6466902624).

3661747740 is an abundant number, since it is smaller than the sum of its proper divisors (9272057508).

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

3661747740 is a wasteful number, since it uses less digits than its factorization.

3661747740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54908 (or 54903 counting only the distinct ones).

The product of its (nonzero) digits is 592704, while the sum is 45.

The square root of 3661747740 is about 60512.3767505458. The cubic root of 3661747740 is about 1541.3318073724.

The spelling of 3661747740 in words is "three billion, six hundred sixty-one million, seven hundred forty-seven thousand, seven hundred forty".