3666706740 has 72 divisors (see below), whose sum is σ = 11193273000. Its totient is φ = 971553024.

The previous prime is 3666706733. The next prime is 3666706751. The reversal of 3666706740 is 476076663.

It can be written as a sum of positive squares in 4 ways, for example, as 314991504 + 3351715236 = 17748^2 + 57894^2 .

It is a super-2 number, since 2×3666706740² = 26889476634322855200, 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 an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36615 + ... + 93134.

It is an arithmetic number, because the mean of its divisors is an integer number (155462125).

Almost surely, 2^3666706740 is an apocalyptic number.

3666706740 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3666706740 is an abundant number, since it is smaller than the sum of its proper divisors (7526566260).

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

3666706740 is a wasteful number, since it uses less digits than its factorization.

3666706740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129921 (or 129916 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 45.

The square root of 3666706740 is about 60553.3379757054. The cubic root of 3666706740 is about 1542.0272873388.

The spelling of 3666706740 in words is "three billion, six hundred sixty-six million, seven hundred six thousand, seven hundred forty".