2661203501 has 8 divisors (see below), whose sum is σ = 2903575584. Its totient is φ = 2418905520.

The previous prime is 2661203483. The next prime is 2661203509. The reversal of 2661203501 is 1053021662.

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 2661203501 - 2²⁶ = 2594094637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661203509) 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, 78851 + ... + 107423.

It is an arithmetic number, because the mean of its divisors is an integer number (362946948).

Almost surely, 2^2661203501 is an apocalyptic number.

It is an amenable number.

2661203501 is a deficient number, since it is larger than the sum of its proper divisors (242372083).

2661203501 is a wasteful number, since it uses less digits than its factorization.

2661203501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37051.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 2661203501 is about 51586.8539552472. The cubic root of 2661203501 is about 1385.7749143938.

The spelling of 2661203501 in words is "two billion, six hundred sixty-one million, two hundred three thousand, five hundred one".