4780280661 has 16 divisors (see below), whose sum is σ = 7225256640. Its totient is φ = 2786883840.

The previous prime is 4780280657. The next prime is 4780280663. The reversal of 4780280661 is 1660820874.

It is not a de Polignac number, because 4780280661 - 2² = 4780280657 is a prime.

It is a super-5 number, since 5×4780280661⁵ (a number of 50 digits) contains 55555 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4780280663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3224820 + ... + 3226301.

It is an arithmetic number, because the mean of its divisors is an integer number (451578540).

Almost surely, 2^4780280661 is an apocalyptic number.

It is an amenable number.

4780280661 is a deficient number, since it is larger than the sum of its proper divisors (2444975979).

4780280661 is a wasteful number, since it uses less digits than its factorization.

4780280661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6451156.

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 4780280661 is about 69139.5737692966. The cubic root of 4780280661 is about 1684.5521691421.

The spelling of 4780280661 in words is "four billion, seven hundred eighty million, two hundred eighty thousand, six hundred sixty-one".