7661772 has 18 divisors (see below), whose sum is σ = 19367348. Its totient is φ = 2553912.

The previous prime is 7661749. The next prime is 7661777. The reversal of 7661772 is 2771667.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 212827 = 7661772 / (7 + 6 + 6 + 1 + 7 + 7 + 2).

It is not an unprimeable number, because it can be changed into a prime (7661777) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 106378 + ... + 106449.

Almost surely, 2^7661772 is an apocalyptic number.

It is an amenable number.

7661772 is an abundant number, since it is smaller than the sum of its proper divisors (11705576).

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

7661772 is a wasteful number, since it uses less digits than its factorization.

7661772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212837 (or 212832 counting only the distinct ones).

The product of its digits is 24696, while the sum is 36.

The square root of 7661772 is about 2767.9906069205. The cubic root of 7661772 is about 197.1407516203.

The spelling of 7661772 in words is "seven million, six hundred sixty-one thousand, seven hundred seventy-two".