61331669 has 8 divisors (see below), whose sum is σ = 70482048. Its totient is φ = 52278480.

The previous prime is 61331623. The next prime is 61331693. The reversal of 61331669 is 96613316.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61331669 is a prime.

It is a super-2 number, since 2×61331669² = 7523147244651122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61331969) 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, 22937 + ... + 25470.

It is an arithmetic number, because the mean of its divisors is an integer number (8810256).

Almost surely, 2^61331669 is an apocalyptic number.

It is an amenable number.

61331669 is a deficient number, since it is larger than the sum of its proper divisors (9150379).

61331669 is a wasteful number, since it uses less digits than its factorization.

61331669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48595.

The product of its digits is 17496, while the sum is 35.

The square root of 61331669 is about 7831.4538241632. The cubic root of 61331669 is about 394.3618794647.

The spelling of 61331669 in words is "sixty-one million, three hundred thirty-one thousand, six hundred sixty-nine".