1386461661 has 16 divisors (see below), whose sum is σ = 1991485440. Its totient is φ = 852920640.

The previous prime is 1386461651. The next prime is 1386461663. The reversal of 1386461661 is 1661646831.

It is a happy number.

It is not a de Polignac number, because 1386461661 - 2¹⁹ = 1385937373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1386461663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217956 + ... + 224226.

It is an arithmetic number, because the mean of its divisors is an integer number (124467840).

Almost surely, 2^1386461661 is an apocalyptic number.

It is an amenable number.

1386461661 is a deficient number, since it is larger than the sum of its proper divisors (605023779).

1386461661 is a wasteful number, since it uses less digits than its factorization.

1386461661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11956.

The product of its digits is 124416, while the sum is 42.

The square root of 1386461661 is about 37235.2207056706. The cubic root of 1386461661 is about 1115.0712579554.

The spelling of 1386461661 in words is "one billion, three hundred eighty-six million, four hundred sixty-one thousand, six hundred sixty-one".