1667138242 has 48 divisors (see below), whose sum is σ = 3306784320. Its totient is φ = 615336480.

The previous prime is 1667138227. The next prime is 1667138257. The reversal of 1667138242 is 2428317661.

It is an interprime number because it is at equal distance from previous prime (1667138227) and next prime (1667138257).

It is a junction number, because it is equal to n+sod(n) for n = 1667138195 and 1667138204.

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, 6288 + ... + 58084.

It is an arithmetic number, because the mean of its divisors is an integer number (68891340).

Almost surely, 2^1667138242 is an apocalyptic number.

1667138242 is a deficient number, since it is larger than the sum of its proper divisors (1639646078).

1667138242 is a wasteful number, since it uses less digits than its factorization.

1667138242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51847 (or 51836 counting only the distinct ones).

The product of its digits is 96768, while the sum is 40.

The square root of 1667138242 is about 40830.6042326096. The cubic root of 1667138242 is about 1185.7429138281.

It can be divided in two parts, 1667138 and 242, that multiplied together give a square (403447396 = 20086²).

The spelling of 1667138242 in words is "one billion, six hundred sixty-seven million, one hundred thirty-eight thousand, two hundred forty-two".