3666139487 has 32 divisors (see below), whose sum is σ = 4095792000.
Its totient is φ = 3268919808.
The previous prime is 3666139481. The next prime is 3666139489. The reversal of 3666139487 is 7849316663.
It is not a de Polignac number, because 3666139487 - 28 = 3666139231 is a prime.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (3666139481) by changing a digit.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3676673 + ... + 3677669.
It is an arithmetic number, because the mean of its divisors is an integer number (127993500).
Almost surely, 23666139487 is an apocalyptic number.
3666139487 is a gapful number since it is divisible by the number (37) formed by its first and last digit.
3666139487 is a deficient number, since it is larger than the sum of its proper divisors (429652513).
3666139487 is a wasteful number, since it uses less digits than its factorization.
3666139487 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1235.
The product of its digits is 3919104, while the sum is 53.
The square root of 3666139487 is about 60548.6538826422.
The cubic root of 3666139487 is about 1541.9477641428.
The spelling of 3666139487 in words is "three billion, six hundred sixty-six million, one hundred thirty-nine thousand, four hundred eighty-seven".