7661994 has 8 divisors (see below), whose sum is σ = 15324000. Its totient is φ = 2553996.

The previous prime is 7661993. The next prime is 7662001. The reversal of 7661994 is 4991667.

It is a sphenic number, since it is the product of 3 distinct primes.

7661994 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7661993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 638494 + ... + 638505.

It is an arithmetic number, because the mean of its divisors is an integer number (1915500).

Almost surely, 2^7661994 is an apocalyptic number.

7661994 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

7661994 is a wasteful number, since it uses less digits than its factorization.

7661994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1277004.

The product of its digits is 81648, while the sum is 42.

The square root of 7661994 is about 2768.0307079222. The cubic root of 7661994 is about 197.1426556544.

The spelling of 7661994 in words is "seven million, six hundred sixty-one thousand, nine hundred ninety-four".