7661631 has 8 divisors (see below), whose sum is σ = 10258864. Its totient is φ = 5086080.

The previous prime is 7661603. The next prime is 7661639. The reversal of 7661631 is 1361667.

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

It is not a de Polignac number, because 7661631 - 2⁶ = 7661567 is a prime.

It is a super-2 number, since 2×7661631² = 117401179160322, which contains 22 as substring.

It is a Duffinian number.

7661631 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7661639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4576 + ... + 6021.

It is an arithmetic number, because the mean of its divisors is an integer number (1282358).

Almost surely, 2^7661631 is an apocalyptic number.

7661631 is a deficient number, since it is larger than the sum of its proper divisors (2597233).

7661631 is a wasteful number, since it uses less digits than its factorization.

7661631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10841.

The product of its digits is 4536, while the sum is 30.

The square root of 7661631 is about 2767.9651370637. The cubic root of 7661631 is about 197.1395422823.

The spelling of 7661631 in words is "seven million, six hundred sixty-one thousand, six hundred thirty-one".