33400670749 has 2 divisors, whose sum is σ = 33400670750. Its totient is φ = 33400670748.

The previous prime is 33400670683. The next prime is 33400670759. The reversal of 33400670749 is 94707600433.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20112345124 + 13288325625 = 141818^2 + 115275^2 .

It is an emirp because it is prime and its reverse (94707600433) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 33400670749 - 2¹⁵ = 33400637981 is a prime.

It is a super-2 number, since 2×33400670749² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33400670759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16700335374 + 16700335375.

It is an arithmetic number, because the mean of its divisors is an integer number (16700335375).

Almost surely, 2^33400670749 is an apocalyptic number.

It is an amenable number.

33400670749 is a deficient number, since it is larger than the sum of its proper divisors (1).

33400670749 is an equidigital number, since it uses as much as digits as its factorization.

33400670749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 381024, while the sum is 43.

The spelling of 33400670749 in words is "thirty-three billion, four hundred million, six hundred seventy thousand, seven hundred forty-nine".