2661229947 has 8 divisors (see below), whose sum is σ = 3550210560. Its totient is φ = 1773201320.

The previous prime is 2661229943. The next prime is 2661229951. The reversal of 2661229947 is 7499221662.

It is an interprime number because it is at equal distance from previous prime (2661229943) and next prime (2661229951).

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

It is a cyclic number.

It is not a de Polignac number, because 2661229947 - 2² = 2661229943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2661229896 and 2661229905.

It is not an unprimeable number, because it can be changed into a prime (2661229943) 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, 231447 + ... + 242672.

It is an arithmetic number, because the mean of its divisors is an integer number (443776320).

Almost surely, 2^2661229947 is an apocalyptic number.

2661229947 is a deficient number, since it is larger than the sum of its proper divisors (888980613).

2661229947 is a wasteful number, since it uses less digits than its factorization.

2661229947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475993.

The product of its digits is 653184, while the sum is 48.

The square root of 2661229947 is about 51587.1102796038. The cubic root of 2661229947 is about 1385.7795048084.

The spelling of 2661229947 in words is "two billion, six hundred sixty-one million, two hundred twenty-nine thousand, nine hundred forty-seven".