6694147642 has 48 divisors (see below), whose sum is σ = 12591338760. Its totient is φ = 2645661312.

The previous prime is 6694147637. The next prime is 6694147673. The reversal of 6694147642 is 2467414966.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3984008161 + 2710139481 = 63119^2 + 52059^2 .

It is a super-2 number, since 2×6694147642² = 89623225305788320328, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

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, 1818708 + ... + 1822384.

Almost surely, 2^6694147642 is an apocalyptic number.

6694147642 is a deficient number, since it is larger than the sum of its proper divisors (5897191118).

6694147642 is a wasteful number, since it uses less digits than its factorization.

6694147642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5135 (or 5128 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 49.

The square root of 6694147642 is about 81817.7709425037. The cubic root of 6694147642 is about 1884.6545712961.

The spelling of 6694147642 in words is "six billion, six hundred ninety-four million, one hundred forty-seven thousand, six hundred forty-two".